Answer:
Reconstruction was an accomplishment in that it reestablished the United States as a bound together country: by 1877, the entirety of the previous Confederate states had drafted new constitutions, recognized the Thirteenth, Fourteenth, and Fifteenth Amendments, and vowed their faithfulness to the U.S. government.
Explanation:
I agree that it would also be D, because the other answers would be just ways to see a scenario and make it best fit for you, whereas D points out what most extremists do.