(A) ** The choice to remain neutral on foreign affairs
(B) When countries decide to defend each other.
(C) When countries agree to not fight in wars.
(D) The answer is not present.
EXPLANATIONS BELOW
Concept note-1: -Isolationism is a political philosophy advocating a national foreign policy that opposes involvement in the political affairs, and especially the wars, of other countries. Thus, isolationism fundamentally advocates neutrality and opposes entanglement in military alliances and mutual defense pacts.
Concept note-2: -Supporters of neutrality, called “isolationists” by their critics, argued that America should avoid entangling itself in European wars. “Internationalists” rejected the idea that the United States could remain aloof from Europe and held that the nation should aid countries threatened with aggression.
Concept note-3: -isolationism, national policy of avoiding political or economic entanglements with other countries.
Concept note-4: -Isolationists advocated non-involvement in European and Asian conflicts and non-entanglement in international politics. Although the United States took measures to avoid political and military conflicts across the oceans, it continued to expand economically and protect its interests in Latin America.