How did both participating in the North Atlantic Treaty Organization and joining the United Nations represent a shift in U. S. foreign policy?
O A. The United States signaled its willingness to use overwhelming
military force to promote its interests.
B. The United States began to focus on peacefully reformning
communist regimes rather than overthrowing them.
C. The United States became committed to helping poor countries in
Asia and Africa develop their economies.
D. The United States abandoned its policy of isolationism and
became more deeply invested in foreign affairs.