Answer: A. the settlement of homesteading farmers on rangeland,
B.a series of extraordinarily severe winters,
C.overgrazing and overproduction, E.barbed-wire fencing
Explanation: Ranchers kept track of their cattle through earmarks and, later, brands. Wanting to protect their own herds, ranchers and farmers began fencing off their land with barbed wire to keep the cattle from roaming. This way they could keep track of their own cattle and ensure their land didn't become overgrazed.