TOEFL Listening: ETS-TOEFL听力机经 - FOYV44GZ7O9J1087P$

According to the professor, what were scientists able to identify in Pacific Ocean currents as a result of flotsam science? A. Long-term changes in temperature and salt content B. Fluctuations in the growth of algae C. The relationship between ocean depth and water movement D. How winds affect water spend and direction