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").

Example Input: Within a twenty four hour period, a person could experience (A) a globe's complete rotation (B) thirty hours of night (C) a day on Pluto (D) a year of schooling
Example Output: A

Example Input: Digestion is when stomach acid breaks down what? (A) food essays (B) sustenance (C) water (D) air
Example Output: B

Example Input: What might happen if too much heat is transferred to an object? (A) freezing (B) solidifying (C) burning (D) moving
Example Output:
C