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: A plane travels through what? (A) gas layers (B) plains (C) oceans (D) time
Example Output: A

Example Input: A plant needs to use the roots of itself to move essential things (A) to the dirt (B) to the sky (C) to the plasma (D) to the buds
Example Output: D

Example Input: The size of a persons head is (A) changed (B) calculated (C) determined by food (D) predetermined
Example Output:
D