Answer:
A) Northern and Southerners disagreed over the spread of slavery.
Explanation:
"What led to the outbreak of the bloodiest conflict in the history of North America? A common explanation is that the Civil War was fought over the moral issue of slavery. In fact, it was the economics of slavery and political control of that system that was central to the conflict. A key issue was states' rights."
Answer:
ended the national origins quota system
Explanation:
<span>Passage of Jim Crow Laws by the state legislature</span>
