Read the following passage from Douglass's speech:
I hear the doleful wail of fettered humanity, on the way to the slave-markets, where the victims are to be sold like horses, sheep, and swine, knocked off to the highest bidder. What is the purpose of this analogy?

A.To reinforce the pain that results from the inhumane treatment of slaves
B.To affirm the necessity of increasing the availability of slave-markets
C.To highlight the pain the rest of the world feels as they watch Americans wrestle with the issue of slavery
D.To show how slaves are treated better than the beasts of burden so critical to the farming industry

I think it's A or D.. I'm not sure..