TOEFL Listening: ETS-TOEFL听力机经 - IV51JS5MM35SS3TDP$

According to the professor, why is tail-flagging of special interest to researchers? A. It is a rare case of two-way communication between a prey species and its predators. B. It has helped researchers understand how rattlesnakes use their heat-sensitive organs. C. It is a communication strategy that many species use to discourage predators. D. It is the first known example of an antipredator behavior that involves a change in body temperature.