Which primary source document could help a historian understand why the US Civil War started?

a map of the 1860 presidential election results

a map showing where the first battles occurred

a Charleston Mercury editorial published in 1860

an essay that lists several possible causes

Question

Which primary source document could help a historian understand why the US Civil War started?

a map of the 1860 presidential election results

a map showing where the first battles occurred

a Charleston Mercury editorial published in 1860

an essay that lists several possible causes

anonymous · Answer

Charleston Mercury editorial published in 1860

anonymous · Answer

The war started when the Union prepared to blockade the ports of seceding states in reprisal for the secessions. Fort Sumter was re-provisioned instead of being abandoned as demanded by Carolina while picket ships were being prepared in the North. 

As the seceding states realized all their ports would be blockaded, and ultimately were, they intensified preparations for war.

anonymous · Answer

Right!!! (:

anonymous · Answer

well i have the same question right now but i dont understand what the answer is