Answer:
C, segregation. Segregation is the act of segregating/separating different races from each other, such as blacks and whites.
Step-by-step explanation:
seg·re·ga·tion
/ˌseɡrəˈɡāSH(ə)n/
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noun
the action or state of setting someone or something apart from other people or things or being set apart.
"the segregation of pupils with learning difficulties"