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 it called when a cell converts oxygen and carbohydrates into carbon dioxide, water, and energy? (A) adaptation (B) breathing (C) food transformation (D) catabolic reactions
Example Output: D

Example Input: What's usually hot in temperature? (A) the Sahara (B) Minnesota (C) Alaska (D) corpses
Example Output: A

Example Input: A magnet will stick to which of the following? (A) indium (B) diamond (C) wood (D) hydrochloric acid
Example Output:
A