I believe your answer is A.. good luck my friend!
Answer:
a:the plebeians revolts
Explanation:
Because of these revolts the plebeians guaranteed the legal validity of the laws formulated by the Tribunes of the Plebe, so that they were valid for all extension of the Roman dominions. This revolt ended a process of long-term political reform. Despite politically balancing Roman social groups, the cultural distinction between a patrician and a plebeian did not radically change.
I was incorrect I will fix in 5 minutes
The Cold War Containment policy was a complete bust because we pour money into failing countries so they there economy was strong enough to where they wouldn't have radical thoughts of communism this was referred to as the Truman doctrine and then the Eisenhower doctrine that funded the middle east. Then we went into the police action "war" in Korea so that the domino effect wouldn't allow other nations to fall to communism