What Does Frederick Douglass's AGAINST SLAVERY Argument Show About Cultural

What does Frederick Douglass's AGAINST SLAVERY argument show about cultural relativism?

A) That the need to resolve contradictions within a culture's moral code shows the need for moral reasoning even if cultural relativism is true.
B) That the moral code of the pre-Civil War American South was worse than the moral code of the contemporary United States.
C) That cultural relativism never has clear implications for what someone ought to do.
D) That cultural relativism cannot be true because that would lead to contradictions.