Answer:
C. Railroad.
Explanation:
The era of cotton, cattle, and railroads in the late 1800s was a time of large economic growth for the state of Texas.
Railroads brought a quick expansion of people, business and cities all over Texas thousands of miles of new track stretched across the state, carrying lumber, cattle, and crops from the state’s farms.
Because railroads enabled farmers and ranchers to transport their products quicker, by the turn of the century Texas had become a leading producer of both cattle and cotton.
