people moved from farms to cities
Answer:
A
Explanation:
Although there are better examples which could have been in the answer.
The United States tried to overthrow communist leader Fidel Castro in Cuba.
It would be that "b. The Soviets would assume the regions of Eastern Europe that bordered the Soviet Union and convert them to communist satellites," that was not a major decision agreed on by the Allied leaders at Yalta in 1945, since the Allies did not want communism to spread at all.