D is the answer ( for cutting off our trade with parts of the world )
The enforcement Acts were acts recommended by Grant and imposeed by congress to try to protect black voters from intimidation and violence.
They were allowed to rejoin if they accepted the 13th amendment. It was one of the reconstruction amendments that ended slavery and gave led to African-Americans getting their voting rights and their freedom.If they wouldn't accept it they wouldn't be allowed back.
The American Federation of Labor (AFL) was a national federation of labor unions in the United States founded in Columbus, Ohio, in December 1886 by an alliance of craft unions disaffected from the Knights of Labor, a national labor association.
