In this task, you are given a multiple-choice question and you have to pick the correct option. Answer with option indexes (i.e., "A", "B", "C", and "D").

If a fish lives in water that is very dark, the fish may calibrate its body over time to (A) absorb helium (B) turn invisible (C) eat more (D) be blind
D

Sleet is (A) potentially dangerous (B) poison (C) hot (D) unhealthy
A

The ocean contains large amounts of what? (A) people (B) salty biscuits (C) fires (D) saline liquids
D