The answer to this is African Americans.
Back around World War II they mostly pay attention to the war so the whole racism left African Americans alone because around that time they didn't quite care for that too much because they mostly want to keep on the whole war thing. Around that time the U.S was just about getting ready to get involved.
Hope this helped :)
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Answer:
A. After they nursed under water
Explanation:
Imperialism is basically countries taking over other countries for power
