A risk practitioner's best course of action when a business manager wants to leverage an existing approved vendor solution from another area within the organization is to assess the risk associated with the new use case. This is because the new use case may introduce different or additional risks that were not considered or addressed in the original approval. For example, the new use case may involve different data types, volumes, or sensitivities; different business processes, functions, or objectives; different regulatory or contractual requirements; or different technical or operational dependencies. Therefore, the risk practitioner should perform a vendor risk assessment (VRA) to identify, evaluate, and mitigate the potential risks of the new use case and ensure that the vendor solution meets the organization's risk appetite and tolerance12.
Recommending allowing the new usage based on prior approval is not the best course of action, as it may overlook or underestimate the risks of the new use case and expose the organization to unacceptable levels of risk. Requesting a new third-party review is not the best course of action, as it may be unnecessary or redundant if the vendor solution has already been reviewed and approved for another use case within the organization. Requesting revalidation of the original use case is not the best course of action, as it may not address the specific risks of the new use case and may also delay or disrupt the existing use case. References = Risk and Information Systems Control Study Manual, Chapter 4: Risk and Control Monitoring and Reporting, Section 4.2: Risk Monitoring, pp. 189-191.

The percentage of projects introduced into production without high-risk issues is the most important measure of the effectiveness of risk management in project implementation, as it reflects the ability of risk management to ensure that the project deliverables meet the quality, functionality, and security requirements, and do not introduce unacceptable risks to the organization. The percentage of projects having the risk register updated regularly, having key risk indicators (KRIs) established to measure risk, or having an action plan to remediate overdue issues are not the most important measures, as they are more related to the process, performance, or compliance of risk management, rather than the outcome or value of risk management. References = CRISC Review Manual, 7th Edition, page 110.

Information security policies are the foundation of an organization's security program, as they define the objectives, roles, responsibilities, and standards for protecting the information assets and systems. However, information security policies are not static, and they need to be reviewed and updated regularly to reflect the changes in the organization's environment, risk profile, and compliance requirements. Therefore, the best course of action when conducting an organization-wide risk assessment is to review the policies against current needs to determine adequacy. This means comparing the policies with the current threats, vulnerabilities, controls, and best practices, and identifying any gaps or weaknesses that need to be addressed.
The other options are not the best course of action, as they do not consider the current needs of the organization. Reviewing and updating the policies to align with industry standards may not be sufficient, as the organization may have specific or unique needs that are not covered by the standards. Determining that the policies should be updated annually may not be realistic, as the frequency of updates may depend on the nature and complexity of the policies and the organization. Reporting that the policies are adequate and do not need to be updated frequently may not be accurate, as the policies may be outdated or ineffective, and may expose the organization to unnecessary risks. References = Risk Assessment and Analysis Methods:
Qualitative and Quantitative - ISACA, Does Your Organization Need a Security Risk Assessment? - ISACA, SP 800-39, Managing Information Security Risk: Organization, Mission ...

The best control to help reduce the risk of fraudulent internal transactions in several business applications is the segregation of duties. Segregation of duties is the principle of dividing the roles and responsibilities of different individuals or groups involved in a business process or an IT service, so that no one person or group has complete control over the entire process or service. Segregation of duties can help to prevent or detect fraud, errors, conflicts of interest, or misuse of resources, by ensuring that there are checks and balances, and that there is adequate oversight and accountability. Segregation of duties can also help to reduce the risk of collusion, compromise, or coercion among the internal staff, by limiting their access and authority to the business applications and data. Periodic user privileges review, log monitoring, and periodic internal audits are also useful controls, but they are not as effective as segregation of duties, as they are reactive and detective measures, rather than proactive and preventive measures. References = CRISC Review Manual, 6th Edition, ISACA, 2015, page 217.

Organizational risk culture is the term describing the values, beliefs, knowledge, attitudes and understanding about risk shared by a group of people with a common purpose. Organizational risk culture influences how the organization identifies, assesses, and manages risks, and how it aligns its risk appetite and tolerance with its objectives and strategies1.
The best indication of a mature organizational risk culture is that risk owners understand and accept accountability for risk, because it means that the organization:
Clearly defines and assigns the roles and responsibilities of the risk owners, who are the individuals or groups who have the authority and ability to manage the risks within their scope or domain Empowers and supports the risk owners to perform their risk management duties, such as identifying, assessing, responding, monitoring, and reporting the risks Holds the risk owners accountable for the outcomes and consequences of the risks, and evaluates their performance and compliance with the risk policies, standards, and procedures Encourages and rewards the risk owners for demonstrating risk awareness and competence, and for contributing to the risk management improvement and learning23 The other options are not the best indications of a mature organizational risk culture, but rather some of the elements or aspects of it. Corporate risk appetite is the amount and type of risk that the organization is willing to accept in order to achieve its objectives. Corporate risk appetite is communicated to staff members to guide their risk decision making and behavior, and to ensure the consistency and alignment of the risk taking and tolerance across the organization. Risk policy is the document that establishes the principles, framework, and process for managing the risks within the organization. Risk policy is published and acknowledged by employees to ensure their awareness and compliance with the risk management expectations and requirements. Management is the group of individuals who have the authority and responsibility to direct and control the organization's activities and resources. Management encourages the reporting of policy breaches to ensure the transparency and accountability of the risk management performance and outcomes, and to identify and address the risk management issues and gaps4. References = Risk culture - Institute of Risk Management Risk Owner - ISACA Taking control of organizational risk culture | McKinsey
[CRISC Review Manual, 7th Edition]