The answer is:
They were enslaved in the South.
On May 12, 1949, one of the first Cold War crises came to an end. The Soviet Union decides to lift the 11-month-long blockade against West Berlin. The three western sectors of Berlin were unified as West Berlin and placed under West German administration.
A and C can work and D is partially true I would go with a or d tho
I believe that the answer is compass because it does show direction, unlike the other answer choices. Hope this helps! :)