How did the Soviet leader Mikhail Gorbacchev improve U.S -Soviet relations during the 1980s?

Question

A. He restricted the Soviet people more than before.
B. He urged the Soviet people to strengthen their communist ideas.
C. He gave the Soviet people more political and economic freedom
D. He worked hard to build nuclear weapons.

Answer 1

I know it's surely not A

Answer 2

That leaves three possibilities. I'll be glad to check your answer.

Answer 3

I think it's C

Answer 4

Yes, C.