i believe it's D. The reader learns more specific statistics about the number of species, the evolution of the reef, and its size.
lmk if i'm wrong!
Chapter 2 summary:
After coming back from Connecticut, Mitty had tons of homework, not to mention, ten pages of notes. At school the next day, his friend Derek, goes on and on about the anthrax murders. After school, Mitty starts on his notes, but decides to skip to his rough draft instead. Mitty continued to read about smallpox, everything happening to the people he is reading about could be happening to him too