Answer:
D. Black Americans could no longer be enslaved
Step-by-step explanation:
As a result of the Civil War, 3 constitutional amendments were passed.
Post Civil War
The Civil War was fought between the Union (North) and the South over the legality and morality of slavery. The Union was against slavery while the South supported slavery. Also, the Union supported more rights for Black Americans than the South did. Many people in the North thought that Black Americans should be treated as equals under the law. So, when the Union won the war, they passed amendments that increased the rights of Black Americans; specifically, the 13th, 14th, and 15th amendments.
13th Amendment
The 13th Amendment states that no one should be subjected to slavery or other nonvoluntary servitude (not that this amendment does not apply to prisoners). In simpler terms, the 13th amendment abolished slavery and freed Black Americans.
The 14th amendment extended citizen rights and allowed Black Americans to be citizens. The 15th amendment gave universal, male suffrage. This means that Black men could vote.