Answer:
D
Step-by-step explanation:
Not A: African American Labor was only central to the South's economy
Not B: Women's opportunities did not greatly expand in the south, so it's a possible candidate but not 100% correct
Not C: Again, possible answer but the south did not see as rapid urbanization as the north
D: Industrialization made the North dependent on the South for the raw materials while the South needed the North to manufacture and sell the finished products.