TOEFL Listening: TPO-TOEFL听力TPO - 8PLPZSILA3EKAB84R$

What does the professor imply about bioluminescent zooplankton? A. Their food source is different from that of other zooplankton. B. They probably do not rely on diel vertical migration to avoid predation. C. They migrate deeper than other zooplankton species do. D. Most species are found in very cold water.