(A) ** closing of the western frontier
(B) ** competition with Europe
(C) ** building a strong Naval network
(D) ending European imperialism
(E) ** belief in racial superiority
EXPLANATIONS BELOW
Concept note-1: -Both a desire for new markets for its industrial products and a belief in the racial and cultural superiority of Americans motivated the United States’ imperial mission.
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.