D.Black codes
Step by step:
A.) Lack of education. To me still has a little to do with the problem but is better than any other choice out of the selection.
The only amendment that has been repealed is prohibition.
It was repealed because it was hugely unpopular, totally ineffective and a large factor in increasing the power of the Mafia in the USA.
It was passed in the first place because of misguided nonsense paraded by well-meaning moralistic busybodies.
<span>Sort of like the war on the (rest of) drugs .... except many of those are still illegal and they were not part of a constitutional amendment.</span>
The correct answer is letter D
Explanation: For the Union and Confederacy it was a difficult moment of the war, the future of them was not clear. They did not know if could win because of the Battle of Shiloh, and all the difficult moments in that battle.
When the Union fought Confederation and took control of New Orleans. It was an important moment, because they could take control of Mississippi the largest port of Confederacy.