Why were railroads the catalyst for industrial and commercial growth in the u. s. in the late 1800s

rail roads were  way to move goods and raw martial on mass. rails roads could move supply faster and over a longer distance than using wagons or boats witch were limited on were they can go.  causing an industrial boom.

The building of railroads was a vital step to connect the land of vast country. It helped to reach the raw material from the rural area to the industrial area. it also saved time and hard labor, otherwise needed for it. The massive construction of railroads boosts the coal, iron and steel industries of the United States. Further, land grants by the Government enhanced the pace of production.

meaning the clothes cost alot of money

the correct answer is:

b) a rich merchant.