10. What was the iron curtain?
A a phrase used by the superpowers to describe their indirect conflict
B a strategy described by George F. Kennan designed to contain Soviet
expansion
Ca metaphor used by Winston Churchill to describe the control exerted
by the Soviet Union
O
D
a doctrine outlined by Harry Truman designed to aid those struggling
against Soviet domination

The Iron Curtain was initially a non-physical boundary dividing Europe into two separate areas from the end of World War II in 1945 until the end of the Cold War in 1991. The term symbolizes the efforts by the Soviet Union to block itself and its satellite states from open contact with the West and its allied states. On the east side of the Iron Curtain were the countries that were connected to or influenced by the Soviet Union, while on the west side were the countries that were NATO members or nominally neutral. Separate international economic and military alliances were developed on each side of the Iron Curtain.

Explanation:

by creating a labor shortage that pushed the continent toward a market economy