TOEFL Listening: ETS-TOEFL听力机经 - 3FMQYJ35J31NJZ3BP$

What does the professor imply when she says this? A. She disagrees with a theory of coral bleaching. B. Students should be able to explain the problems associated with photosynthesis. C. Some aspects of the coral bleaching process are not yet understood. D. Increased photosynthesis causes a problem that is not easily apparent.