Why was the 1950s the decade of prosperity?

Thats because, there was no more war and that people have the right to show liberty and freedom. But during the 1950s there was very less polution and issues. Except for racism, sexism, religious beliefs, discrimination, and bigotry. But also on the 1950s, it was a decade of prosperity is because people can express their cultural beliefs and that their lives start to evolve for the better.

Ithink the answer is a.