How did the completion of the transcontinental railroad affect companies that made products?

a. companies could hire people who worked in different states.

b. companies could build factories in the rural west.

c. companies could expand into the south.

d. companies could ship goods cheaply over long distances.

One answer is correct (D).

The construction of railroads in the US during the 19th century is considered one of the milestones of US development, since it has paved the way for producers to explore new markets at a low cost of transportation.

The railroads connected cities, making it possible to supply products to the American internal market, and linked production sites to export ports.

the answer is a) james madison.

a.that is my answer.

brainliest .