TOEFL Reading: ETS-TOEFL阅读机经 - LXPTI9S5O3E3G63TL$

Why does the author mention "a yet undescribed species of red algae from the Bahamas?" A. To suggest that the concept of chromatic adaptation applies only to algae living in deep waters B. To argue that location is more important than chromatic adaptation in determining the vertical distribution of algae C. To emphasize the difficulty of testing the concept of chromatic adaptation in deep waters D. To provide information that may confirm the idea that chromatic adaptation is responsible for the vertical distribution of algae