Which most accurately explains the role played by debates over popular sovereignty in causing the Civil War?

Question

They convinced the federal government to establish more colonies that allowed slavery in order to maintain a balance between free and slave states.
They prevented slaves from being used in northern factories, as Northerners became convinced that the labor of African Americans was inferior.
They led to arguments about the role citizens should play in determining the legality of slavery in their home states and territories.
They lent credibility to the slave uprisings that abolitionists supported in an effort to spark the beginning of the Civil War.

C?

Answer 1

Yes, C,