Which government entity oversees the NISP?

The Defense Counterintelligence and Security Agency (DCSA) is the correct answer because it is specifically tasked with overseeing the National Industrial Security Program (NISP). The DCSA provides guidance, oversight, and support to safeguard classified information provided to contractors in the defense industrial base. This agency manages security clearances for contractors and ensures that they comply with security standards necessary to protect national security interests.

In contrast, the Department of Homeland Security focuses on protecting the nation from various threats but does not directly manage the NISP. The National Security Agency and the Central Intelligence Agency primarily deal with foreign intelligence and national security matters rather than overseeing the security of industrial facilities within the NISP framework. Thus, DCSA's comprehensive role and expertise in industrial security make it the authoritative entity responsible for the NISP.