What Was True About International Relations Regarding Cuba

What was true about international relations regarding Cuba?

A) After the Bay of Pigs invasion, Castro became close allies with China.
B) Mao took advantage of the tension between America and Cuba to increase economic investments in Cuba.
C) The United States and the Soviet Union were on the threshold of nuclear war over Soviet missiles in Cuba.
D) The Soviet Union, China, and Cuba created a Caribbean military pact.
E) Cuba, fearing American attack, began to develop its own nuclear arsenal with aid from the Soviets.