Answer :
The correct answer is A) Hungarian Revolt of 1956.
When Stalin’s eventual successor, Nikita Khrushchev, came to power in the Soviet Union, many Americans initially hoped that he would permit political reform. Their hopes were dashed by Khrushchev’s response to the Hungarian Revolt of 1956.
When Nikita Khrushchev became the Premier of the Soviet Union, he tried to establish a more peaceful coexistence with the world and the United States and changed many repressive policies established by Joseph Stalin. But Khrushchev had an authoritarian side. He ordered to crush the revolt in Hungary in 1956.
On November 4, 1956, Khrushchev sent tanks and soldiers to crash a protest that demanded a democratic system and the end of the Soviet Union interference in Hungarian affairs. The USSR soldiers killed many people and wounded many more.