When did black people first begin advocating an end to slavery in the U.S.?

Question

A) before there was a U.S., before the Revolutionary War
B) around the time "King Cotton" began to dominate the southern economy
C) when Quakers began publicly denouncing slavery
D) when the English antislavery movement began to be felt in the U.S.

Answer 1

A) before there was a U.S., before the Revolutionary War