Final answer:
The industrial expansion in the United States produced great prosperity for the owners of factories, mines, railroads, and large farms.
Step-by-step explanation:
The industrial expansion in the United States produced great prosperity for the owners of factories, mines, railroads, and large farms. The growth of the American economy in the last half of the nineteenth century created tremendous wealth for business owners due to factors such as industrialization, capitalism, and access to vast natural resources. However, this prosperity often came at a high cost to workers, who faced difficult working conditions and low wages.