What were two of the main causes of the Civil War?

The four Causes of the Civil Wars Slavery, One Union vs state's rights, The growing differences between the North and the South and The election of President Lincoln.

I would say Communism played a big role in it too.

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answer; people where able to travel across the u.s.a faster than any other mode of transportation,travel time was about a week,from coast to coast

the answer is a) the proclamation of 1763.