The USArmy Encouraged the Slaughter of Millions of Buffalo

The U.S.Army encouraged the slaughter of millions of buffalo

A) because the buffalo limited the grazing range for cattle.
B) in order to feed hungry industrial workers in the North.
C) to stop the spread of disease among cattle herds in the Plains.
D) because the great herds interfered with the building of the transcontinental railroad.
E) in order to weaken the Plains Indians by depriving them of their source of food,clothing,and shelter.