TOEFL Listening: ETS-TOEFL听力机经 - 9S1I6P1S899M19E8P$

What evidence found researcher does the professor describe to show that the Natufians were NOT a nomadic people? A. Tools that were too heavy to move very far B. Large structure used for stoning grain C. Stone enclosures that separated one home from another D. Underground foundations for house E. Remains of certain animals