TOEFL Listening: ETS-TOEFL听力机经 - 145RP5Z042Y0W8O8P$

Why does the professor say this: A. To ask the students to share their opinions about a nomadic lifestyle. B. To indicate that she disagrees with the description of the Gara Montes people. C. To indicate that the lifestyle of the Gara Montes people might be difficult to investigate. D. To find out if the students understand the concept of a nomadic lifestyle.