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: Cows know there is salt in a mineral lick because (A) they have receptors on their tongue that allow them to experience spice and seasonings (B) a cow in the ocean told them it was there (C) it's on their side of the pasture's fence (D) they evolved where there were great redwood trees
Example Output: A

Example Input: What requires energy for growth? (A) a car (B) a hippopotamus (C) a house (D) a desk
Example Output: B

Example Input: During photosynthesis, plants produce sugar that may help with their what? (A) Babies (B) Love Handles (C) Belly (D) sustenance
Example Output:
D