Answer:
e. all of the above
Explanation:
This is true because, not only did the southerners began questioning the morality of slavery and its associated trading, they also vented their angers towards the northern abolitionists. The Northerners on the other-hand, wondered why the southerners were surprised with the idea that the slaves in question would rebel from their masters.
The answer is slavery. The Republicans were anti-slavery, while the democratic south was pro slavery. Eventually that, and a couple of other things, led to the Civil War.
Sorry if this was a bit late, Brainly had just recommended this question for me to answer, but I hope this helps!
Good Friday was signed 1990 I'm not aware of the others.