I would say the answer is 3. im so sorry if im wrong.
Answer:
it was called the roaring 20s because it had economic growth and widespread prosperity and defied prohibition
In the context of the Cold War, "containment" was a US strategy, wherein communism would be "contained" in the East. It didn't want communism to spread from the USSR to East European countries, China, Korea, and Vietnam. It was one of the most basic strategies in the Cold War.
Pretty sure it was the civil war!