C.) It shifted the economic system of the United States from locally-based to nationally-based
Explanation:
The first transcontinental railroad in the United States is the name of a railroad line through the United States that united the city of Omaha (Nebraska) with Sacramento in the 1860s, thus uniting the Eastern rail network of the United States. with California, on the Pacific coast. It ended with the famous Golden Spike ceremony held on May 10, 1869 in Promontory, Utah, creating a nationwide mechanized transportation network that revolutionized the population and economy of the American West. that the famous wagon trains (wagon trains) of the so-called old west of previous decades became obsolete, changing them by a modern transport system.
