The best approach for an auditor to review the operating effectiveness of the password requirement is to review the configuration settings on the Configuration Management (CM) tool and verify that the CM tool agents are functioning correctly on the VMs. This method ensures that the password policies are being enforced as intended and that the CM tool is effectively managing the configurations across the organization's virtual machines. It provides a balance between relying solely on automated tools and manual verification processes.
Reference = This approach is supported by best practices in cloud security and auditing, which recommend a combination of automated tools and manual checks to ensure the effectiveness of security controls123. The use of CM tools for enforcing password policies is a common practice, and their effectiveness must be regularly verified to maintain the security posture of cloud services.

The first step to switch from the ISO/IEC 27002 control framework to the NIST 800-53 control framework is to map ISO/IEC 27002 and NIST 800-53 and detect gaps and commonalities. This step can help the organization to understand the similarities and differences between the two frameworks, and to identify which controls are already implemented, which controls need to be added or modified, and which controls are no longer applicable. Mapping can also help the organization to leverage the existing work done under ISO/IEC
27002 and avoid starting from scratch or discarding valuable information. Mapping can also help the organization to align with both frameworks, as they are not mutually exclusive or incompatible. In fact, NIST SP 800-53, Revision 5 provides a mapping table between NIST 800-53 and ISO/IEC 27001 in Appendix H-21. ISO/IEC 27001 is a standard for information security management systems that is based on ISO/IEC
27002, which is a code of practice for information security controls2.
References:
* NIST SP 800-53, Revision 5 Control Mappings to ISO/IEC 27001
* ISO - ISO/IEC 27002:2013 - Information technology - Security techniques - Code of practice for information security controls

Explanation
The reason for designing the Consensus Assessments Initiative Questionnaire (CAIQ) is to help cloud service providers document their security and compliance controls. The CAIQ is a survey provided by the Cloud Security Alliance (CSA) that consists of a set of yes/no questions that correspond to the controls of the Cloud Controls Matrix (CCM), which is a cybersecurity framework for cloud computing. The CAIQ allows cloud service providers to demonstrate their security posture and compliance status to potential customers and auditors, as well as to identify any gaps or risks that need to be addressed. The CAIQ also enables cloud customers to assess the security capabilities of different cloud service providers and compare them based on their needs and requirements123.
The other options are not directly related to the question. Option A, cloud users can use CAIQ to sign statement of work (SOW) with cloud access security brokers (CASBs), is incorrect because CAIQ is not a contract or an agreement, but a questionnaire that provides information about the security controls of a cloud service provider. A statement of work (SOW) is a document that defines the scope, deliverables, and terms of a project or service. A cloud access security broker (CASB) is a software tool or service that acts as an intermediary between cloud users and cloud service providers, providing visibility, data security, threat protection, and compliance4. Option B, cloud service providers can document roles and responsibilities for cloud security, is incorrect because CAIQ is not designed to document roles and responsibilities, but security and compliance controls. Roles and responsibilities for cloud security are defined by the shared responsibility model, which outlines how the security tasks and obligations are divided between the cloud service provider and the cloud customer5. Option D, cloud service providers need the CAIQ to improve quality of customer service, is incorrect because CAIQ is not a measure of customer service quality, but a measure of security control transparency. Customer service quality refers to how well a cloud service provider meets or exceeds the expectations and satisfaction of its customers6. References := What is CASB? - Cloud Security Alliance4 What is CAIQ? | CSA - Cloud Security Alliance1 Shared Responsibility Model - Cloud Security Alliance5 What is CAIQ? - Panorays2 What is the Consensus Assessments Initiative Questionnaire (CAIQ ...3 What Is Customer Service Quality? - Salesforce.com

A RACI chart is a tool used to clarify the roles and responsibilities in processes, projects, or operations. In the context of cloud compliance, documenting these responsibilities in a RACI chart ensures that all parties within the enterprise are aware of their specific obligations regarding compliance with laws and regulations. This helps in creating a clear, organized view of how each part of the organization contributes to overall compliance, facilitating better coordination and accountability.
References = The answer is informed by general best practices in cloud compliance and governance, which recommend the use of RACI charts or similar tools to delineate responsibilities clearly. While I can't reference specific documents from the CCAK or related resources, these practices are widely accepted in the field of cloud security and compliance.