It's definitely A as one answer, but I'm unsure about the other answer. But I can almost 100% say that C is most likely the second answer. I hope I helped in some ways!
The changes that communism brought to Cuba were many. For one, commercial and political relationships were broken with many nations making Cuba an ethnocentric country. In relation to the atmosphere of the Cold War, communism greatly influenced contemporary geopolitics and the timeline of the Cold War. It brought to the United States and the Soviet Union to the brink of nuclear war that had become the daily fear in American society and elsewhere.
