HELP ASAP PLS What was a result of the changing economy of the North during the mid- 1800s?

A. Cities became less important as more people went to work as small farmers.
B. Large farms were more profitable in the North because of the cotton gin.
C. Slaves were more common in the North as factory workers.
D. The working class grew as more people were needed to work in factories. SUBMIT​

its C

Explanation:

a.) d-day invasion of normandy.

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