From the viewpoint of the southern states, what were the three main causes of the Civil War?

The growth of the western states was a threat.
The southern states were able to get high prices for their cotton and tobacco.
They did not have fair representation in the government due to smaller population.
They should have the right to make their own laws about slavery.
The protective tariff on manufactured goods was unfair.
Confederate States of America invited the southern states to withdraw from the Union.