One Way That the United States Helped to End the Cold

One way that the United States helped to end the Cold War was by:

A) encouraging countries to trade with the Soviet Union.
B) allowing the Soviet Union a spot on the United Nations Security Council.
C) building up the U.S. military, which helped bankrupt the Soviet Union.
D) providing arms to rebels within the Soviet Union.
E) tearing down the Berlin Wall, allowing people to escape Soviet territory.