During the 1960s, what was the main reason for the tensions between Cuba and the United States?
A. Cuba's involvement in the Vietnam War.
B. Cuba's refusal to trade with the United States.
C. Cuba's close relationship with the Soviet Union.
D. Cuba's support for the Civil Rights Movement in the United States.
A. Cuba's involvement in the Vietnam War.
B. Cuba's refusal to trade with the United States.
C. Cuba's close relationship with the Soviet Union.
D. Cuba's support for the Civil Rights Movement in the United States.