Which of the following revoked southern blacks' civil rights?

a. local and state laws c. Fifteenth Amendment

b. Civil Rights Act of 1875 d. Fourteenth Amendment

The question is asking to choose among the following that is the revoked of southern blacks' civil rights, base on my research and on my further investigation, I would say that the answer would be letter b. Civil Rights Act of 1875. I hope you are satisfied with my answer and feel free to ask for more