Answer:
railroads made resources and products easier to transport
Step-by-step explanation:
The establishing of the railroads across the Untied States was revolutionary, and it managed to prompt a rapid development of numerous industries, thus a boom in the economy. The railroads made it possible for the resources to be transported over long distances, as well as the manufactured goods. Not that it was possible to transport them over long distances, but it was also much cheaper and much faster.