You said you’d give me brain if I gave you the best answer? Is that right
I believe c is the answer because the word it's is saying it is
They competed in various ways, but primarily militarily and through space. Each built its military up to best one another, especially through the development of nuclear weapons. Space aspects, each side was in a space race to develop better and better space technology, which also partially related to military missile development.
Psychologicaly, it was terrifying for people. You didn’t know if a war would start the next day. Nuclear drills were common, which didn’t help either.
Hope this helps!
