Answer:
I believe C to be correct.
Explanation:
The answer is assembly line.
Answer: A way to keep plantations running.
Explanation:
Slavery played a fundamental role during the American Civil War. Most of the South's slaves were used in the plantations. During and before the Civil War, slaves fought for their own freedom, and many of them fled from servitude during the war.
Slavery was the main reason for secession, primarily for the Southern opposition to the efforts by Northern antislavery political powers to prevent the development of slavery in western states.
It changed when some of them entered the armed forces as medics or nurses. But the African Americans changed when Americans saw how much they wanted to fight for a country that didn't give them their freedom.