A major factor in the expansion of industrialization was the development of A.Socialism B.Feudalism C.Land Grants D.Railroads E.disability insurance
The correct answer here is clearly D -- railroads. When the railroad network of the United States expanded, it helped the country become more industrialized. Here's how:
The expansion of railroads helped cause industrialization because it helped create a huge demand for steel and thing like railroad cars. This caused a demand for more factories.
In addition, the coming of railroads made it so that companies could get raw materials from faraway places and then sell their goods to faraway places as well. This expanded the US market and helped cause more industrialization.