It would be in "D. Haiti" that slavery ended with revolution than by government decree, since this was the result of a massive slave uprising that ended up ultimately being successful.
Answer:
Option: C. Radicals
Explanation:
The former Confederates had to swear an oath of allegiance after the Civil War. It promoted by Radical Republicans to prevent the political activity of Confederate veterans and supporters in the South. A confederate person had to swear to support and defend the Constitution of the United States.
