AWS Artifact is the correct answer because it is AWS's service that provides on-demand access to AWS's compliance reports and certifications, including PCI DSS compliance documentation.

Explanation of options:

• AWS Certificate Manager (ACM): Used for provisioning, managing, and deploying SSL/TLS certificates for AWS services, not for compliance documentation
• AWS Artifact: Provides access to AWS security and compliance documents, including PCI DSS, SOC reports, and other certifications
• AWS License Manager: Helps manage software licenses across AWS and on-premises environments, not related to compliance documentation
• AWS CloudTrail: Records AWS API calls for auditing and security monitoring, but doesn't provide compliance certifications

For PCI DSS compliance verification, AWS Artifact is specifically designed to provide the necessary documentation that auditors require to validate that AWS services meet PCI DSS requirements.