Slavery, states' rights, and sectionalism were the major causes of
a) the civil war.
b) the american revolution.
c) the mexican-american war.
d) the french and indian war.

The south wanted slavery, the north wanted to abolish it. The south wanted more states' rights and less federal involvement while the north wanted the opposite. The south wanted to succeed from the union when they could not get what they wanted (this is an example of sectionalism). This led to A.) The Civil War.