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Answer: C.Railroads (Quick Answer )
(Several factors led to the rise of U.S. industrialization in the late 1800’s. New technologies like steam engines, railroads, and telegraphs made communication and transportation easier. The ability to source and transport materials across the country with ease turned many local businesses into national companies. Workplace innovations, such as the assembly-line method of production, allowed these companies to produce goods on a mass scale.)
(Expert Answers )
(During the second half of the 19th century, a new wave of industrialization spread throughout the U.S. There were several factors spurring this technological movement on. First, several new technologies were developed and improved in rapid succession. Railroads, steam engines, telegraph lines, and the internal combustion engine all became more readily available. More and more Americans found themselves depending on industrial technologies for communication and for economic and social activities.)