In the mid-nineteenth century, the plains indians were a. usually able to unite against white aggression. b. not as vulnerable to disease as eastern tribes. c. among the least aggressive of all american indians. d. mostly sedentary farmers. e. the most widespread indian groups in the west. 2. which tribe should not be included among the plains indians? a. the yurok

The correct answer in the first question is letter e. It is because during the mid-nineteenth century, the plain Indians were considered to have the most widespread in the West in which made letter E as the correct answer.

The correct answer in the second question is Yurok as they are not included or part of the plains Indians. Yurok are considered to be the downriver people that has a neighboring language. They are not Indians but rather they are native Americans living in the northwestern of the California. The correct answer is letter A.