The Fifteenth Amendment to the U.S. Constitution was one of the three amendments enacted after the American Civil War to ensure equality for black Americans, who had been harshly discriminated for decades.
This Amendment, ratified on 1870, was created primarily for the purpose of granting former slaves suffrage: It guarantees the right to vote of all U.S.'s male citizens (African Americans had already been considered citizens under the 14th Amendment), stating that this right will not be denied or abridged by the federal or the state government on account of race, color, or previous condition of servitude.
I believe the answer is D as B and C are just completely false and while A could be possible its not the answer because granting voting rights to former slaves doesn't really punish the south but it does give former slaves suffrage. So its D
