Answer:
The main cause, and most important factor of the civil war was slavery. Slavery caused the Civil War because they were being treated unfairly by the South. The North did not like that they were being treated so unfairy. It was a very important factor because the south had been using their slaves to aid the war effort.
Explanation:
(blm:))
I think the answer is either A or B
The blockade was supposed to prevent the South from getting resources and support from other countries who would support it such as those in Europe who were ready to recognize it as independent and help it if it meant that in the long run it would help them by weakening the Union.
That city was Seattle, Washington.
