Sorry if this is a little late but im almost positive it is C
<span>The secession of several border states</span>
Answer:-
because They were on different sides of the war, one won, one lost, so they had different opinions.
Answer: I don’t think it’s a question, so thanks for the points!
Explanation:
South Carolina was the first because they though that their way of life was threatened from the election of President Abraham Lincoln.
Answer:
Federalism has evolved over the course of American history. ... Because the powers rarely overlapped, dual federalism is also known as 'layer cake' federalism. Dual federalism was used in this country for a long time. However, by the 1930s, 'layer cake' federalism began to morph into 'marble cake' federalism.