What did the National Security Act of 1947 establish?

• A. The CIA, the Federal Communications Commission, and the Department of Education.
• B. The Space Force and the National Cyber Directorate.
• C. The NSC, Department of Defense structure, and unified military command system.
• D. The National Weather Service and the National Guard Bureau.

Answer: (C)

The main idea is the postwar reorganization of the U.S. national security apparatus to coordinate military and intelligence efforts. The National Security Act of 1947 created the National Security Council to advise the president on security matters, restructured the military under the Department of Defense, and established a unified command system to coordinate activities across the different service branches. This combination of a central policy advisory body, a single Secretary of Defense overseeing a merged military structure, and a unified command framework was the core change the act brought about.

That’s why this option is the best fit. The other choices mention agencies or forces that either existed before or were created later and are not the set of reforms the act enacted.