The author groups North American Indians according...

C

- Hướng dẫn giải

Phương pháp giải:

Giải chi tiết:

Đáp án là C. tribes and geographical regions (các bộ tộc và khu vực địa lý) . Phần đề cập đến ý này: In the Far North the ancestors of today’s Inuit hunted seals, walruses, and the great whales. They lived right on the frozen seas in shelters called igloos built of blocks of packed snow. … The Cheyenne, Pawnee and Sioux tribes, known as the Plains Indians, lived on the grasslands between the Rocky Mountains and the Mississippi River .”