The answer is Letter C. Iron curtain is the political separation of Western and Eastern Europe. It started from the end of World War II in 1945 until the last part of Cold War in 1991. Countries who are members of the Warsaw pact are located at the east side of the Iron Curtain while NATO members are on the west side.
The reason being the slaves rather stayed slaves. I say this because they didn’t have anywhere to go and so they basically just stayed with their old masters until they earned money
