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1.) Massive amounts of Natural Resources such as oil, iron and coal.

2.) Inventions and discoveries

3.) Population growth in the cities. Rural people wanted to find jobs as well as immigrants

4.) Government didn't interfere with industries. This is called the "hands-off" method because the government allowed businesses to do their own thing

5.) Improved transportation.

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Q: What were the four causes of the Industrial Expansion in America?
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