Answer: D. To return power to the white democrats.
Step-by-step explanation:
Following the Civil War, although African-Americans achieved emancipation, citizenship, and the right to vote, many white Southerners demanded a policy of Redemption instead of Reconstruction, demanding the reinstatement of white supremacy and the elimination of rights for African-Americans.
Political pressure was usually supported by a mob and paramilitary violence, with the Ku Klux Klan as the most well-known example.