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: heat and pressure change the remains of what into natural gas? (A) leaves (B) cans (C) books (D) cars
Example Output: A

Example Input: Animals adapt to their what? (A) appearance (B) feet (C) skin (D) nature places
Example Output: D

Example Input: As the amount of water a plant receives increases what will usually happen with it? (A) diminish (B) shrinking (C) grow metal (D) expanded proportions
Example Output:
D