Why did Southerners argue states' rights were violated by abolition of slavery?

A They believed all states should be slave states.
B Abolition would cause states to pay higher taxes.
C Abolition violated states' rights to choose what their laws should be.Abolition violated states' rights to choose what their laws should be.
D They argued abolition would cause freed slaves to take over their states.

C Abolition violated states' rights to choose what their laws should be.