During the mid-1800s, the greatest danger to american indians in the west was a. stampeding buffalo herds. b. tough journeys along western trails. c. contaminated drinking water. d. a lack of immunity to certain diseases.

Option:d.a lack of immunity to certain diseases.

Explanation:

Native Indians during the mid-1800s were forced to move to the West. The Indian Removal Act by the government of Unites States began the immigration of the Native Indians to Indian Territory (Oklahoma). The journey in the Western trails was tough with cold winter, diseases, shortage of food, wagons, horses, and other supplies made the walks hard.

a. "how old man winter was driven back” and “ormuzd and arimanes"