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").

[EX Q]: 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
[EX A]: D

[EX Q]: A person in a suit near a sunken ship is sprayed in the face with a dark substance by (A) a cephalopod (B) a bear (C) a hose (D) a pencil
[EX A]: A

[EX Q]: A predator such as a hawk may kill prey by (A) batting with a paw (B) clutching in its talons (C) using a strong wing (D) eating a rat's claw
[EX A]:
B