Soal Pilihan GandaVarious other Native American tribes also lived on the Great Plains. The Sioux, a group of seven Native American tribes, are best known for the fiercely combative posture against encroaching White civilization in the 1800s. Although they are popularly referred to as Sioux, these Native American tribes did not call themselves Sioux; the name was given to them by an enemy tribe. The seven Sioux tribes called themselves by some variation of the word Dakota, which means "allies" in their language. Four tribes of the eastern Sioux community living in Minnesota were known by the name Dakota. The Nakota included two tribes that left the eastern woodlands and moved out onto the plains. The Teton Sioux, or Lakota, moved even farther west to the plains of the present-day states of North Dakota, South Dakota, and Wyoming.

7. It is implied in the passage that the seven Sioux tribes called each other by some form of the word Dakota because they .........

(A) united in a cause
(B) all living in North Dakota
(C) fiercely combative
(D) enemies