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

Example Input: A good conductor of electricity would be (A) tree (B) coke bottle (C) your finger (D) coke can
Example Output: D

Example Input: The organ most made of muscle is the (A) one pumping blood (B) brain (C) liver (D) kidney
Example Output:
A