TASK DEFINITION: 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").
PROBLEM: 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

SOLUTION: D

PROBLEM: People can touch something to see if it's (A) shiny (B) red (C) striped (D) wrinkled

SOLUTION: D

PROBLEM: Absorbing sun rays (A) raises the Fahrenheit of an object (B) lowers the Celsius of an object (C) causes the object to cool (D) causes the temperature of the object to descend

SOLUTION:
A