SAT US History Practice Question

Which of the following was NOT a factor in ending the cattle boom of the late 1800s?

1. A.The supply of cattle became too great for the demand, bringing prices down.
2. B.The use of barbed wire to fence off land led to range wars among ranchers.
3. C.Severe weather conditions in the period 1885-1887 killed hundreds of cattle.
4. D.The U.S. government set aside some of the best grazing land for displaced Native American tribes.
5. E.Once the open range was fenced off, ranchers had to buy land, and that ate up their profits.