TOEFL Listening: ETS-TOEFL听力机经 - 1B9O8WFN9VC9BQ3JP$

What point does the professor make about the bone structure of Tiktaalik's appendages? A. It would not have allowed Tiktaalik to leave the tracks that were discovered B. It would not have allowed Tiktaalik's appendages to support its weight for extended periods of time C. It made Tiktaalik's appendages suitable for swimming D. It was identical to the bone structure of tetra pods' appendages.