(A) conatinment
(B) humanitarianism
(C) neutrality
(D) ** imperialism
EXPLANATIONS BELOW
Concept note-1: -In the late nineteenth century, the United States abandoned its century-long commitment to isolationism and became an imperial power. After the Spanish-American War, the United States exercised significant control over Cuba, annexed Hawaii, and claimed Guam, Puerto Rico, and the Philippines as territories.
Concept note-2: -The most important argument in favor of US imperialism was the financial gain to be had by giving American businesses access to colonial resources and markets.
Concept note-3: -In the U.S. context, a host of economic, geopolitical, cultural, and political motives caused what scholars call the “new imperialism” beginning in 1898.