What did black codes do to former slaves?

Maybe it helped the white people to recognize them

Black codes were restrictive laws designed to limit the freedom of African Americans and ensure their availability as a cheap labor force after slavery was abolished during the Civil War. And required Black people to sign yearly labor contracts; if they refused, they risked being arrested, fined and forced into unpaid labor.

Explanation:  (I read some of the parts talking about the black codes on what they do to former slaves and found the answers... ) HOPE THIS HELPS IF NOT THEN IM SORRY THATS ALL I CAN DO

https://www.history.com/topics/black-history/black-codes

  the common sense as a pamphlet written by thomas paine. it promoted the independence of the colonies from british rule. the distribution of this pamphlet was great, it reached people everywhere and it was even read aloud at places people met. it also unite the colonists before the revolutionary war.

answer is d