If the organization wants to save them in a cost effective way, which is the best possible solution?

Explanations:

AWS RRS (Reduced Redundancy Storage) is designed for data that can be easily recreated and doesn’t require high durability. It is not ideal for compliance-related storage.

AWS S3 (Simple Storage Service) is a general-purpose storage service and not the most cost-effective option for infrequently accessed data.

AWS RDS (Relational Database Service) is a managed database service and not suitable for storing policy files or infrequent access data.

AWS Glacier is designed for long-term, low-cost archival storage, making it ideal for infrequent access data such as verified policy files that may only be accessed in case of compliance issues.