Question

Why did the Soviet Union close off all surface access to Berlin from the west?
A) The United Stated had started to build up military installations in the western part of the city.
B) U.S and West German agitators had repeatedly scaled the wall that divided the city.
C) A failed exchange of spies at the city's notorious "Checkpoint Charlie" had convinced the Soviets to starve West Berlin into submission.
D) Western European nations had announced plans for a single West German Republic.

Answer

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