What led President John F. Kennedy to blame Soviet premier Nikita Khrushchev for causing a threat to world peace?

A. the Soviet enforcement of a naval blockade of Cuba

B. the building of Soviet nuclear missile sites in Cuba

C. the Soviet role in the overthrow of Fulgencio Batista

D. the Soviet role in the failure of the Bay of Pigs invasion

The answer is B This question is for those looking for the answer.