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").

Input: Consider Input: An example of replacing a natural resource like copper might be (A) recovering ores (B) running around (C) throwing up (D) using plastic straws

Output: A


Input: Consider Input: Thick feathers can be used for (A) climbing, cracking nuts and peeling fruit skins. (B) courtship and looking for food (C) killing prey, preening and feeding young (D) staying weatherproof, flexible and free of bacteria

Output: D


Input: Consider Input: in the presence heat, which of these comes about? (A) a melted snocone at the cafeteria (B) an ice cream cone (C) a piece of gum (D) a large metamorphic rock


Output: A