An increase in railroad mileage in an area led to great economic growth in that area. between 1870 and 1890, which area had the greatest increase in railroads and, as a result, the most significant economic growth?

The West of the United States had the population and economy revolutionized by the construction of nationwide mechanized transportation, transcontinental railroads connecting the already existing railroad networks in the East to the poorly structured West. The railroads were central to a national market and served as an example of how to manage a large corporation.

Western states and territories

Explanation:

b/c i took the quiz on e2020

north atlantic treaty organization.