21 is A and 24 is A (*~*)
African Americans continued to face a wide range of threats in the south, many of which were violent in nature such as threats of lynching and murder. Congress initially sent federal troops into the region to attempt to enforce the Reconstructions laws and mitigate these threats.
The event that led to this system was the civil war. People had different views than other people, and there was both rich and poor differences as well. Hope this helps!
Answer:
Europe, America, and China
Explanation:
The U.S. allowed Missouri to choose to be a slave state / equal number of states on both sides.
Hope this helps!! :D