AWS Artifact is the correct option because it provides on demand access to AWS compliance reports and certifications such as SOC 2 Type II and ISO/IEC 27001 for requested time frames like the past twelve months.

AWS Artifact is the AWS service that publishes AWS owned compliance reports and agreements so you can download or share them with external auditors. The service exposes third party audit reports and AWS certifications that document how AWS controls its infrastructure and services which auditors require for vendor attestations.

AWS Organizations centralizes multi account governance and policy management but it does not host or distribute AWS compliance artifacts for download.

AWS IAM handles identity and access management for users, roles, and permissions which is unrelated to obtaining AWS compliance reports.

AWS Audit Manager helps you automate evidence collection and assess your own environment but it does not serve as the repository for AWS's own compliance certifications and third party audit reports.

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