During the 1800s, the city of Lowell, Massachusetts, a. was a center for banking.
b. had many shipyards.
c. had many industrial mills.
d. was a center of fishing.

a

Explanation:

the person on top is right its A.

Explanation:

- "made the south's economy grow rapidly and a small effect that a lot of people don't know is that it made the more demand of slaves and cotton products. and also new states formed due to plantations growing in size."

< 3

answer; i believe the two groups were irish immigrants and chinese immigrants;