Why was intelligence so important during the Cold War? The US was concerned about the possibility of a nuclear attack.
The US wanted to find out how communism was spreading so fast.
The US wanted to know how the Soviet Union became a superpower.
The US was concerned about how the Soviet Union was treating its citizens.

THE ANSWER IS A

The US wanted to find out how communism was spreading so fast

Explanation:

The US knew how the USSR had become a super power, and they didn't care how the citizens were being treated. The threat of a nuclear attack was on the minds of many, but the US's main goal during the Cold War was to prevent communism from spreading, so using intelligence agents to find out how it was spreading is the best answer.