Which of the following statements is false?
A. Barbed wire made it difficult for ranchers driving cattle north to the railroad because they had to go far around the fences instead of going in a straight path.
B. Boll weevils could wipe out entire herds because they attacked the cattle and caused disease.
C. overcrowded ranges made it difficult for the grass to recover, which could cause cattle to starve
D. Ranchers who relied on wind mills and wells for irrigation and water for cattle could suffer if the water supplies went dry.