This is a late answer but the answer who those needs it. C. All supplies and communications from the west were cut off. I know this because I had the same question on my lesson.
Answer: C. emergence of factories in the North and the Midwest
Many people moved from farms (rural) to cities (urban) in search of work. Many of those jobs were factory jobs due to the industrial revolution. As more people are hired, the size of the city expands.
The answer should be the last one
Answer:
high in class and society
