(A) purchase of Alaska
(B) ** policy of imperialism
(C) size of the United States military
(D) closing of the frontier
EXPLANATIONS BELOW
Concept note-1: -As World War II transformed both the United States and the USSR, turning the nations into formidable world powers, competition between the two increased.
Concept note-2: -Initially, Americans did not look to take over other countries. Having been colonists themselves, many Americans were against it. America also feared that foreign involvement would bring the country into a war. However, attitudes began to change in the late 1800’s as America began to look to the Pacific.
Concept note-3: -Security, prosperity, and the creation of a better world are the three most prominent goals of American foreign policy. Security, the protection of America’s interests and citizens, is a perennial concern, but America has tried to achieve security in different ways throughout its long history.
Concept note-4: -The corollary stated that not only were the nations of the Western Hemisphere not open to colonization by European powers, but that the United States had the responsibility to preserve order and protect life and property in those countries.