(A) Isolationism
(B) ** Imperialism
(C) Expansionism
(D) Communism
EXPLANATIONS BELOW
Concept note-1: -Imperialism is the state policy, practice, or advocacy of extending power and dominion, especially by direct territorial acquisition or by gaining political and economic control of other territories and peoples.
Concept note-2: -Expansionism refers to states obtaining greater territory through military empire-building or colonialism.
Concept note-3: -Imperialism can be defined as a doctrine, political strategy, practice, state policy, or advocacy that consists in extending power by territorial acquisition or by extending political and economic control outward over other areas.
Concept note-4: -The policy of imperialism is introduced by Portuguese Governor Afonso de Albuquerque. Portuguese Governor Afonso de Albuquerque is considered the real founder of Portuguese power. He was the first European of the Renaissance to raid the Persian Gulf.
Concept note-5: -Answer and Explanation: Expansionism refers to spreading one’s country onto other lands, which may or may not be occupied. Imperialism refers to controlling other countries, which the empire may or may not directly settle. The American establishment of a continental empire was a mix of both.