Answer:
C. New factories needed workers.
Step-by-step explanation:
The main reason why many African Americans decided to move to the North during the 1900s was that the new factories required workers. This was due to the industrialization and the growth of cities that was taking place in the North. African Americans who moved to the North were hoping to find a higher paying job in one of these factories. Many white people from the South and immigrants from abroad also moved to the North looking for similar opportunities.