Answer :
C. The Gadsden Purchase gave the United States land to build a railroad.
At the time, America was expanding the railroads from east coast to west coast, and the land in the Gadsden Purchase was prime land for railroads that the United States government wanted.
At the time, America was expanding the railroads from east coast to west coast, and the land in the Gadsden Purchase was prime land for railroads that the United States government wanted.
The correct choice is C. The Gadsden purchase gave the United States land to build a railroad.