Answer:
C. Many people wanted to stay in the Union.
Step-by-step explanation:
A is not correct as on the 1860 elections most of them voted for John C. Breckinridge.
B is not correct, as this was not the reason for any country, including North Carolina.
C is correct as North Carolina had a strong economy, that wasn't based on slavery and therefore did not wanted to jeopardize their development.
D is not correct as North Carolina did not depend on slavery and agriculture that much, as other southern states did.