When the thirteenth amendment abolished involuntary servitude, it became illegal to

The Thirteenth Amendment was the first of a series of Amendment that aimed at recognizing the basic liberties of all race -especially of black people- during the Reconstruction Era. This Amendment prohibited slavery or any other system of involuntary servitude, a system that had been so common in the United States so far; thus, it became illegal to regard anyone as a slave and to force one person to work for another person against their will.

if it were me, i would pick c. c is the best answer because it's basically saying go on a non-violent strike for india