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.
You're answer is going to be C. "The Red Scare".
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The correct answer is option D " …in a changing world worthy institutions can be conserved only by adjusting them to the changing time". Calvin Coolidge was the 30th president of the United States, a republican lawyer that had a successful political life. His philosophy against active government was that institution should change with the government in order to stay active and productive to the society.