Answer:
For African Americans to vote
Explanation:
President Lincoln suggested the prerequisites for African Americans to vote in these three standards: owning property, being able to read and write, or having served in the union military.
The correct is:deadly governmental "purging ".
Take off D; the North had won some battles up to that point. Rip off A; the South would never let go of slavery. Take off B, since the Union had some wins already. You can now clearly see where the answer is.
He was famous for discovering the real orbit of the planets and many others