Who is responsible for establishing minimum standards for the security of classified information storage?

The correct answer is the General Services Administration (GSA) because it plays a crucial role in managing federal property and services, which includes establishing policies related to the protection of classified information storage. The GSA sets forth the minimum standards and guidelines that federal agencies must adhere to when storing classified information, ensuring that security measures are maintained appropriately across different departments.

Understanding the context of the GSA's responsibilities highlights its vital role in the federal infrastructure, ensuring that classified information is secure from unauthorized access. This includes not just establishing physical security standards but also addressing how such information is stored and managed within government facilities.

While other agencies like the Department of Defense, National Security Agency, and Homeland Security have significant roles in security and intelligence operations, the GSA specifically focuses on the overarching standards necessary for classified storage across various governmental agencies, placing it in a unique position of responsibility for this area.