TOEFL Reading: ETS-TOEFL阅读机经 - DQ63H_GCV160Y95KL$

All of the following are mentioned in paragraph 1 as evidence that the Natufians may have engaged in the growing and processing of cereals and grains EXCEPT A. tools with a specific pattern of wear B. the widespread presence of grinding stones C. the presence of clay containers results from D. the analysis of Natufian teeth