The correct answer is C) NSC-68.
NSC-68 was the 1950-report that urged stepped-up production of atomic bombs, the development of hydrogen bombs, and a build-up of U.S. conventional weapons to stay ahead of the Soviet Union who was developing their own nuclear arsenal.
We are talking about the conflictive and tense years of the Cold War in which the Soviet Union and the United States competed in the arms race, the space race, and the containment or spread of Communism in different parts of the world.
US President Harry S. Truman read the report elaborated by the State Department, the CIA, and the Defense Department in April 1950. The paper urged the President to accelerate the production of nuclear weapons because the Soviet Union was a powerful enemy and difficult times were to come.