Question

the principle that the united states has the right to act as the \policeman of the western hemisphere\ and intervene in the internal affairs of latin american nations was established by the
good neighbor policy.
open door policy.
roosevelt corollary to the monroe doctrine.
missionary diplomacy.

Explanation:

The Roosevelt Corollary to the Monroe Doctrine expanded the Monroe Doctrine, asserting the U.S. right to intervene in Latin - American affairs as a "policeman" of the Western Hemisphere. The Good Neighbor policy was about non - intervention. The Open Door policy pertained to trade in China. Missionary Diplomacy was related to promoting American values through missionary work.

Answer:

C. Roosevelt Corollary to the Monroe Doctrine