Regarding suppliers of a cloud service provider, it is most important for the auditor to be aware that the client organization has a clear understanding of the provider's suppliers. This is because cloud services often involve multiple parties in the supply chain, such as cloud providers, sub-providers, brokers, carriers, and auditors. Each party may have different roles and responsibilities in delivering the cloud services and ensuring their quality, security, and compliance. Therefore, it is essential for the client organization to have visibility and assurance of the performance and compliance of the provider's suppliers and to establish clear and transparent agreements with them regarding their roles, responsibilities, expectations, and obligations.12 An auditor should be aware of the importance of the client organization's understanding of the provider's suppliers because it provides a basis for assessing the risks and challenges associated with outsourcing services to a cloud provider and its supply chain. An auditor can use the client organization's understanding of the provider's suppliers to verify that the client organization has conducted a thorough due diligence of the provider's suppliers and their capabilities, qualifications, certifications, and reputation. An auditor can also use the client organization's understanding of the provider's suppliers to evaluate whether the client organization has implemented adequate controls and processes to monitor, audit, or verify the security and compliance status of their cloud services and data across the supply chain. An auditor can also use the client organization's understanding of the provider's suppliers to identify any gaps or weaknesses in the client organization's security management program and to provide recommendations for improvement.34

It is most important for the auditor to be aware that the client organization has a clear understanding of the provider's suppliers. The provider's suppliers are the third-party entities that provide services or products to the provider, such as infrastructure, software, hardware, or support. The provider's suppliers may have a significant impact on the quality, security, reliability, and performance of the cloud services that the provider delivers to the client organization. Therefore, the auditor should ensure that the client organization knows who the provider's suppliers are, what services or products they provide, what risks they pose, and what contractual or regulatory obligations they have123.
The other options are not correct. Option A, the client organization does not need to worry about the provider's suppliers, as this is the provider's responsibility, is incorrect because the client organization cannot rely solely on the provider to manage its suppliers. The client organization has to perform due diligence and oversight on the provider's suppliers, as they may affect the client organization's own security, compliance, and business objectives12. Option B, the suppliers are accountable for the provider's service that they are providing, is incorrect because the suppliers are not directly accountable to the client organization, but to the provider. The provider is ultimately accountable to the client organization for its service delivery and performance12. Option C, the client organization and provider are both responsible for the provider's suppliers, is incorrect because the responsibility for the provider's suppliers depends on the shared responsibility model, which defines how the security and compliance tasks and obligations are divided between the provider and the client organization. The shared responsibility model may vary depending on the type and level of cloud service that the provider offers12. Reference := Cloud Computing: Auditing Challenges - ISACA1 Cloud Computing: Audit Considerations - ISACA2 Top 16 Cloud Computing Companies & Service Providers 2023 - Datamation

According to the ISACA CCAK Study Guide, the auditor should report the findings to the management of the organization being audited, as they are the primary stakeholders and decision makers for the cloud service. The management is responsible for ensuring that the cloud service meets the requirements and expectations of the community, as well as complying with any relevant laws and regulations. The auditor should also communicate the findings to the cloud service provider, as they are the secondary stakeholders and service providers for the cloud service. The cloud service provider should be aware of any issues or gaps identified by the auditor and work with the management to resolve them. The auditor should not report the findings to the public, shareholders, or interested parties, as they are not directly involved in the cloud service or its governance. The auditor should respect the confidentiality and privacy of the community and its data, and only disclose the findings to those who have a legitimate need to know. Reference := ISACA, Certificate of Cloud Auditing Knowledge (CCAK) Study Guide, 2021, p. 971 ISACA, Cloud Auditing Knowledge: Preparing for the CCAK Certificate Exam, 2021, p. 36

The most significant difference between a cloud risk management program and a traditional risk management program is the shared responsibility model. The shared responsibility model is the division of security and compliance responsibilities between the cloud service provider and the cloud service customer, depending on the type of cloud service model (IaaS, PaaS, SaaS). The shared responsibility model implies that both parties have to collaborate and coordinate to ensure that the cloud service meets the required level of security and compliance, as well as to identify and mitigate any risks that may arise from the cloud environment123.
Virtualization of the IT landscape (A) is a difference between a cloud risk management program and a traditional risk management program, but it is not the most significant one. Virtualization of the IT landscape refers to the abstraction of physical IT resources, such as servers, storage, network, or applications, into virtual ones that can be accessed and managed over the internet. Virtualization of the IT landscape enables the cloud service provider to offer scalable, flexible, and efficient cloud services to the cloud service customer. However, virtualization of the IT landscape also introduces new risks, such as data leakage, unauthorized access, misconfiguration, or performance degradation123.
Risk management practices adopted by the cloud service provider © are a difference between a cloud risk management program and a traditional risk management program, but they are not the most significant one. Risk management practices adopted by the cloud service provider refer to the methods or techniques that the cloud service provider uses to identify, assess, treat, monitor, and report on the risks that affect their cloud services. Risk management practices adopted by the cloud service provider may include policies, standards, procedures, controls, audits, certifications, or attestations that demonstrate their security and compliance posture. However, risk management practices adopted by the cloud service provider are not sufficient or reliable on their own, as they may not cover all aspects of cloud security and compliance, or may not align with the expectations or requirements of the cloud service customer123.
Hosting sensitive information in the cloud environment (D) is a difference between a cloud risk management program and a traditional risk management program, but it is not the most significant one. Hosting sensitive information in the cloud environment refers to storing or processing data that are confidential, personal, or valuable in the cloud infrastructure or platform that is owned and operated by the cloud service provider. Hosting sensitive information in the cloud environment can offer benefits such as cost savings, accessibility, availability, or backup. However, hosting sensitive information in the cloud environment also poses risks such as data breaches, privacy violations, compliance failures, or legal disputes123. Reference := Cloud Risk Management - ISACA Cloud Risk Management: A Primer for Security Professionals - Infosec ...
Cloud Risk Management: A Primer for Security Professionals - Infosec ...