Answer:
B
Step-by-step explanation:
The Iron Curtain was not a real curtain at first, it was a name that Winston Churchill came up with. It described the boundary that divided the continent of Europe into 2 sections: Western democracies and non-communist governments, and Soviet communism. Eventually, the Soviets actually built a barrier at this boundary to isolate themselves.
Therefore, the correct answer is B: the division between communist and democratic nations.