What Was the Effect of the Black Codes Passed in the South

What was the effect of the black codes passed in the South following the Civil War?

A) Special protections were granted to newly freed black people to protect them from violence and intimidation.
B) Blacks were given key rights to citizenship such as the right to bear arms and serve on juries.
C) Free blacks were effectively reenslaved by a separate legal system that restricted them.
D) Free blacks were forced to work for their former masters if they could not prove they had other forms of income.