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: What is the source of cooling that turns lava into land? (A) seawater (B) refrigerators (C) air conditioning (D) glaciers
Example Output: A

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

Example Input: which one of these would be most nourished? (A) a person who eats once daily (B) a person fasting all day (C) a person who only drinks water (D) a person who feeds thrice daily
Example Output:
D