TOEFL Listening: ETS-TOEFL听力机经 - 8L4H1RT634DY1OCTP$

What type of evidence does the professor refer to in support of the meeting-point hypothesis? A. The large number of species of fish that form schools B. The types of floating objects under which tuna aggregate C. The percentage of fish species that aggregate under floating objects D. The size of schools formed by tuna that aggregate under floating objects