Most African American politicians were members of the Republican party Thus Option D is the right answer.
Explanation:
Civil war resulted in union states to attain victory and triumphant over the southern states which are called confederate states.
Abraham Lincoln rendered Emancipation proclamation which had a deep impact on the psyche of the southerners who were protesting for enfranchisement rights.
Lincoln belonged to Republican Party and southerners had a strong faith and belief towards Lincoln’ proclamation. Martin Luther King Jr who also belonged to the anti-slavery Republican Party fought for the annihilation of racialism and envisioned an integrated politicalsystem in America.
