The best justification for making a revision to a password policy is a risk assessment. A risk assessment is a process of identifying, analyzing, and evaluating the potential threats and vulnerabilities that may affect the confidentiality, integrity, and availability of information assets and systems. By conducting a risk assessment, the organization can determine the appropriate level of security controls and measures to protect its information assets and systems, including password policies. A risk assessment can also help identify any gaps or weaknesses in the existing password policy, and provide recommendations for improvement based on the organization's risk appetite and tolerance. The other options are not the best justification for making a revision to a password policy, although they may be some inputs or outputs of the risk assessment process. A vendor recommendation is an external source of advice or guidance that may or may not be relevant or applicable to the organization's specific context and needs. A vendor recommendation should not be followed blindly without conducting a risk assessment to evaluate its suitability and effectiveness. An audit recommendation is an internal source of feedback or suggestion that may or may not be accurate or complete.
An audit recommendation should not be implemented without conducting a risk assessment to verify its validity and feasibility. An industry best practice is a general standard or guideline that may or may not reflect the organization's unique characteristics and requirements. An industry best practice should not be adopted without conducting a risk assessment to customize it according to the organization's goals and priorities

= Continuous monitoring is the process of collecting, analyzing, and reporting on the security status of an organization's information systems and networks. Continuous monitoring enables an organization to identify and contain security incidents by providing timely and accurate information on the security events, alerts, incidents, and threats that may affect the organization. Continuous monitoring also helps to measure the effectiveness and compliance of the security controls, policies, and procedures that are implemented to protect the organization's information assets. Continuous monitoring can be performed using various tools and methods, such as security information and event management (SIEM) tools, intrusion detection and prevention systems (IDS/IPS), vulnerability scanners, log analyzers, and audit trails.
References = CISM Manual1, Chapter 6: Incident Response Planning (IRP), Section 6.2: Continuous Monitoring2
1: https://store.isaca.org/s/store#/store/browse/cat/a2D4w00000Ac6NNEAZ/tiles 2: 3

Standards are detailed statements of the minimum requirements for hardware, software, or security configurations. They are used to define the minimum security controls required for user workstations. References = CISM Review Manual, 16th Edition, page 69.

The business client should be responsible for determining access levels to an application that processes client information, because the business client is the owner of the data and the primary stakeholder of the application. The business client has the best knowledge and understanding of the business requirements, objectives, and expectations of the application, and the sensitivity, value, and criticality of the data. The business client can also define the roles and responsibilities of the users and the access rights and privileges of the users based on the principle of least privilege and the principle of separation of duties. The business client can also monitor and review the access levels and the usage of the application, and ensure that the access levels are aligned with the organization's information security policies and standards.
The information security team, the identity and access management team, and the business unit management are all involved in the process of determining access levels to an application that processes client information, but they are not the primary responsible party. The information security team provides guidance, support, and oversight to the business client on the information security best practices, controls, and standards for the application, and ensures that the access levels are consistent with the organization's information security strategy and governance. The identity and access management team implements, maintains, and audits the access levels and the access control mechanisms for the application, and ensures that the access levels are compliant with the organization's identity and access management policies and procedures. The business unit management approves, authorizes, and sponsors the access levels and the access requests for the application, and ensures that the access levels are aligned with the business unit's goals and strategies. References =
* ISACA, CISM Review Manual, 16th Edition, 2020, pages 125-126, 129-130, 133-134, 137-138.
* ISACA, CISM Review Questions, Answers & Explanations Database, 12th Edition, 2020, question ID
1037.

The most effective course of action when employees are using free cloud storage services to store company data through their mobile devices is to assess the business need to provide a secure solution, such as a corporate-approved cloud service or a virtual desktop environment. Assessing the business need can help understand why employees are using free cloud storage services, what kind of data they are storing, and what are the security risks and requirements. Based on the assessment, the security manager can propose a secure solution that meets the business needs and complies with the BYOD policy. The other options, such as allowing the practice to continue, disabling remote access, or initiating remote wipe, may not address the underlying business need or may cause disruption or data loss. References:
* https://www.digitalguardian.com/blog/byod-security-expert-tips-policy-mitigating-risks-preventing- breach
* https://news.microsoft.com/en-xm/2021/03/18/how-to-have-secure-remote-working-with-a-byod-policy/
* https://www.trendmicro.com/vinfo/us/security/news/cybercrime-and-digital-threats/-infosec-guide- bring-your-own-device-byod