Which of the following Black Codes is a violation of the Fourteenth Amendment?
A. Negroes could not sue whites in courts or testify against whites.
B. Negroes may sue other negroes.
C. Negroes could not carry a firearm.
D. Negroes could not vote.
The Black Codes that is most a violation of the Fourteenth Amendment would be that "A. Negroes could not sue whites in courts or testify against whites," since this implies that blacks were not citizens.