Of the choices that you give here, the best is A.

Choice B is not true.  It was not Du Bois who did this.  Rather, it was Booker T. Washington who helped to establish such a school.  That school was in line with Washington's idea that African Americans should learn trades and do a good job at relatively menial work.  At that point, he felt, whites would acknowledge that blacks deserved rights.  Du Bois did not agree with this so C is not correct.

Du Bois was born after slavery ended and was born in the North so D is not correct.

Unlike Washington, Du Bois did want full equality for African Americans and he did not want to have to wait a long time for it.