TOEFL Listening: ETS-TOEFL听力机经 - A3XT8NDZX6S30X4LP$

What does the professor think may be an important use of ocean-acoustics research? A. It may help researchers identify mysterious sounds in other environments. B. It may provide new information about climate change. C. It may reveal a relationship between earthquakes and underwater volcanoes. D. It may help biologists track whales' migration routes.