What were some of the different cases for imperialism?​

the United States exerted political, social, and economic control over countries such as the Philippines, Cuba, Japan, Korea.

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British established protectorates over Niger River Delta, British protectorates such as Nigeria, India and Burma, and US protectorates on Pacific Islands. the United States exerted political, social, and economic control over countries such as the Philippines, Cuba, Japan, Korea.

Explanation:

answer; (d) i believe that the correct answer is americans finally ran out of ammunition;