Answer:
Imma go with the 3ed one,
Answer:
At first, there was an equal number of free and slave states. They made up the 30' 30 line that would separate slave and free states. But then more states were added, and they got the choice on whether they wanted to be slavery or not. After a while, everything fell apart. That was what started the Civil War.
Explanation:
Many maintain that the primary cause of the war was the Southern states' desire to preserve the institution of slavery. Others minimize slavery and point to other factors, such as taxation or the principle of States' Rights. ... All four states strongly defend slavery while making varying claims related to states' rights.