How did the invention of the railroad contribute to a boom in cattle ranching?
A
It became less expensive for workers to travel to work on cattle ranches because they could take trains.

B
The price of land in the West plummeted, so ranchers were able to buy huge tracts of land for grazing cattle.

C
It became cheaper to transport cows nationwide, so meat was more affordable and demand increased.

D
Land used to graze horses began to be used for cattle as horses became less important for transportation.