The growth of national railroads in the late 1800's had what major effect on the united states
a.) it increased the number of immigrants who relocated to the east coast of the united states
b.) it decreased the accessibility of people in the western united states to goods made in europe and shipped to port cities such as new-york
c.) it shifted the economic system of the united states from locally-based to nationally-based
d.) it inhibited the growth of western cities such as denver and dallas

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.

d) a constitutional amendment