Final answer:
The Transcontinental Railroad had a significant impact on industrial growth, massive corporations, and the shaping of the American economy.
Explanation:
The impact of the Transcontinental Railroad was profound, contributing to industrial growth, the rise of massive corporations, and the linking of towns and cities. It enabled the creation of vast fortunes in the Gilded Age, spurred labor demands, and facilitated the opening of the American West. The railroad companies played a crucial role in shaping the nation's economy and required advanced management techniques and capital.
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