Answer:
B
Step-by-step explanation:
The Cold War is called the Cold War because the United States and the USSR never fought each other directly.
Instead, they fought indirectly through proxy wars like the Vietnam and Korean War. Basically, they sent money and help to one side that was fighting. For example, in the Korean War, the US helped South Korea, because they were against Communism, and the USSR aided North Korea, since they were for Communism.
So, the correct answer is B: indirect.