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 mountain top heats and lava flows, resulting in (A) a hot golden leaf (B) a cold deep sea (C) a raised portion of land (D) a sunken valley of ice
Example Output: C

Example Input: Consumers eat other what? (A) oxygen (B) animal toys (C) rays (D) weaker bugs
Example Output: D

Example Input: A solid has a fixed shape. When liquid is boiled and turns into gas, its shape is (A) impermanent (B) talk (C) play games (D) smile
Example Output:
A