TOEFL Listening: TPO-TOEFL阅读TPO - T5L4FJDC3O07E5OON$

Which of the sentences below best expresses the essential information in the highlighted sentence in the passage? Incorrect choices change the meaning in important ways or leave out essential information. A. Studies of the teeth of Natufians suggest the importance of cereals in their culture although they still hunted and foraged. B. The Natufians specialized in collecting cereals and may have been in the process of domesticating certain animals. C. Studies of the teeth of Natufians suggest that these people became hunter-foragers after they began domesticating cereals. D. The Natufians' diet consisted mostly of cereals and lacked sufficient meat.