which of the following best shows how the issue of states' rights contributed to the onset of the Civil War?

Question

a many northerners believed that states' right should not extend to slave states
b many southerners believed that giving states additional rights would hold western expansion
c many southerners believed the rights of their states were threatened by Northern abolitionists
d many northerners believed the rights of their states were threatened by the election of Abraham Lincoln

Answer 1

c many southerners believed the rights of their states were threatened by Northern abolitionists