What Initially Drew Many Blacks to the Harlem Area of New

What initially drew many blacks to the Harlem area of New York City?

A) The area had been a way station on the underground railroad, and it had a vibrant history of black protest.
B) Because builders were unable to sell to whites, they sold to blacks to avoid bankruptcy.
C) They were forced into the area by whites who wanted them out of more expensive areas.
D) For almost a century, the area had numerous powerful black politicians.