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: Who'd be able to see a rose is pink at night? (A) rocks (B) the Rio Grande (C) a beeping sound (D) lemurs
Example Output: D

Example Input: The producer makes its own: (A) body (B) sustenance (C) air (D) grass
Example Output: B

Example Input: An example of a chemical reaction might be (A) a rusty knife (B) Water (C) Grass (D) Smiling
Example Output:
A