TOEFL Listening: ETS-TOEFL听力机经 - 3YB3EB3VAXOPU425P$

What happens to some cephalopods when they swim over a gravel patch on the seafloor? A. They change their skin color to match the color of the darkest pieces of gravel. B. They display irregularly shaped dark and light patches. C. They display a disruptive coloration to match the local environment. D. They quickly swim away from the gravel patch.