TOEFL Listening: ETS-TOEFL听力机经 - 9WG5XB5HB9S43LFWP$

What point does the professor make about the theory that agriculture brings about social changes? A. Recent research had yielded unexpected evidence supporting the theory. B. The theory seems to be contradicted by the development of society in New Guinea. C. Future discoveries in Kuk are likely to provide definitive proof for the theory. D. The theory explains why New Guinea has become an egalitarian society.