The correct answer is: Option D. He used diction common among the harlem poets.
Countee Cullen is considered a prominent figure in the Harlem Renaissance. The writers proper of this community, the Harlem Poets, are commonly known for writing about the struggles of black people in America - specifically during the time of a great migration from the southern states involving this group around the beggining of the 20th century. The poem "Incident" by Cullen is an evident example of this claim.
