Answer:
Sharpeville massacre, (March 21, 1960), incident in the Black township of Sharpeville, near Vereeniging, South Africa, in which police fired on a crowd of Black people, killing or wounding some 250 of them. It was one of the first and most violent demonstrations against apartheid in South Africa
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Answer:
C. They wanted to send other nations a stern warning not to interfere in US government.
They needed to maintain a certain level of strength for "duties".