The best way for the organization to take advantage of the supplier relationship feature of the Cloud Controls Matrix (CCM) is to leverage this feature to enable a smarter selection of the next cloud provider. The supplier relationship feature is a column in the CCM spreadsheet that indicates whether a control is influenced by contractual agreements between the cloud service provider and the cloud customer. This feature can help the organization to identify and compare the security and compliance capabilities of different cloud providers, as well as to negotiate and customize the terms of service (TOS) and service level agreements (SLA) according to their needs and requirements123.
The other options are not the best ways to use the supplier relationship feature. Option A, filter out only those controls directly influenced by contractual agreements, is not a good way to use the feature because it would exclude other important controls that are not influenced by contractual agreements, but still relevant for cloud security and governance. Option B, leverage this feature to enable the adoption of the Shared Responsibility Model, is not a good way to use the feature because the Shared Responsibility Model is defined by another column in the CCM spreadsheet, which indicates whether a control is applicable to the cloud service provider or the cloud customer. Option C, filter out only those controls having a direct impact on current TOS and SLA, is not a good way to use the feature because it would exclude other controls that may have an indirect or potential impact on the TOS and SLA, or that may be subject to change or negotiation in the future. Reference := What is CAIQ? | CSA - Cloud Security Alliance1 Understanding the Cloud Control Matrix | CloudBolt Software3 Cloud Controls Matrix (CCM) - CSA2

To ensure a cloud service provider is complying with an organization's privacy requirements, a cloud auditor should first review the organizational policies, standards, and procedures that define the privacy objectives, expectations, and responsibilities of the organization. The organizational policies, standards, and procedures should also reflect the legal and regulatory requirements that apply to the organization and its cloud service provider, as well as the best practices and guidelines for cloud privacy. The organizational policies, standards, and procedures should provide the basis for evaluating the cloud service provider's privacy practices and controls, as well as the contractual terms and conditions that govern the cloud service agreement. The cloud auditor should compare the organizational policies, standards, and procedures with the cloud service provider's self-disclosure statements, third-party audit reports, certifications, attestations, or other evidence of compliance123.
Reviewing the adherence to organization policies, standards, and procedures (B) is a subsequent step that the cloud auditor should perform after reviewing the organizational policies, standards, and procedures themselves. The cloud auditor should assess whether the cloud service provider is following the organization's policies, standards, and procedures consistently and effectively, as well as whether the organization is monitoring and enforcing the compliance of the cloud service provider. The cloud auditor should also identify any gaps or deviations between the organization's policies, standards, and procedures and the actual practices and controls of the cloud service provider123.
Reviewing the legal and regulatory requirements is an important aspect of ensuring a cloud service provider is complying with an organization's privacy requirements, but it is not the first step that a cloud auditor should take. The legal and regulatory requirements may vary depending on the jurisdiction, industry, or sector of the organization and its cloud service provider. The legal and regulatory requirements may also change over time or be subject to interpretation or dispute. Therefore, the cloud auditor should first review the organizational policies, standards, and procedures that incorporate and translate the legal and regulatory requirements into specific and measurable privacy objectives, expectations, and responsibilities for both parties123.
Reviewing the IT infrastructure (D) is not a relevant or sufficient step for ensuring a cloud service provider is complying with an organization's privacy requirements. The IT infrastructure refers to the hardware, software, network, and other components that support the delivery of cloud services. The IT infrastructure is only one aspect of cloud security and privacy, and it may not be accessible or visible to the cloud auditor or the organization. The cloud auditor should focus on reviewing the privacy practices and controls that are implemented by the cloud service provider at different layers of the cloud service model (IaaS, PaaS, SaaS), as well as the contractual terms and conditions that define the privacy rights and obligations of both parties123.
References :=
* Cloud Audits and Compliance: What You Need To Know - Linford & Company LLP
* Trust in the Cloud in audits of cloud services - PwC
* Cloud Compliance & Regulations Resources | Google Cloud