TOEFL Listening: TPO-TOEFL听力TPO - X947F7V819U04150R$

What does the professor mainly discuss? A. How the parenting behavior of Oviraptors may have differed from that of other dinosaurs B. Evidence that parenting behavior in birds may have originated with dinosaurs C. Physical traits shared by dinosaurs, crocodiles, and birds D. The changing attitudes of the public toward dinosaurs