World War II ended shortly after the United States dropped two atomic bombs on Japan. Four years later, the Soviet Union responded by successfully detonating an atomic bomb.
How did these developments affect the policy of the United States?
A) The United States mobilized all of its armed services
B) The United States drafted all young men into military service
C) The United States increased its efforts to construct nuclear weapons
D) The United States suspended diplomatic relations with the Soviet Union
Which letter choice is correct?