Which answer best describes a main benefit of the Transcontinental Railroad?
a) It proved to the world that the United States was capable of great feats of engineering.
b) It created safe, high-paying jobs for immigrants who wanted to work building the railroad.
c) It created jobs, towns, and a quick path for settlers to come to California to try to make their fortune.
d) It raised the prices of goods shipped across the country, making merchants and the railroad companies rich.