What were black codes ??

Laws that limited the rights of African Americans after they were freed from slavery.

Explanation:

The Black Codes sometimes called Black Laws, were laws governing the conduct of African Americans (free and freed blacks). In 1832, James Kent wrote that "in most of the United States, there is a distinction in respect to political privileges, between free white persons and free colored persons of African blood; and in no part of the country do the latter, in point of fact, participate equally with the whites, in the exercise of civil and political rights.

the answer is definitley b!