The National Security Archive Is a

The National Security Archive is a

A) private organization that makes extensive use of Freedom of Information Act (FOIA) requests to obtain information about the activities of national security agencies.
B) bureau-level agency in the Department of Homeland Security that classifies the security clearance requirements of all government documents.
C) part of the National Security Agency that classifies the security clearance requirements of all government documents.
D) private organization that the federal government contracts to provide backup copies for all national security documents.