Respuesta :
Answer:
Many cities became industrial centers.
Explanation:
The railroad was incredibly important for the development of industry in the United States.
This is simply because the railroad as means of transportation, allowed industrial goods to be shipped and distributed more quickly and effectively.
Because industry tends to cluster around the cities, railroards were built to connect several cities, especially in the Northeast and the Great Lakes, and these cities became industrial centers very quickly, during the second half of the nineteenth century.