Answer:
I believe it’s A, but it might also be D.
Step-by-step explanation:
The Soviet Union had tested H-bombs which means that they could destroy the U.S. This meant that we were very worried that the U.S.S.R. might engage the U.S. in a nuclear war. For that reason, it’s probably A. However, U.S. leaders did utilize propaganda to make its citizens afraid of communism, so it could be D, but I would go with A.