SAT US History Practice Question

"From Stettin in the Baltic to Trieste on the Adriatic, an iron curtain has descended across the continent." The phrase "iron curtain," coined in 1947, refers to the

1. A.Marshall Plan, which provided millions of dollars in U.S. aid to any nation in Europe that requested it
2. B.Allied invasion of Normandy during World War II
3. C.borderline between nations under Soviet communist influence and the rest of the world
4. D.borderline between Northern and Southern Europe
5. E.concrete wall that divided East Berlin from West Berlin