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: What is a source of oxygen through photosynthesis? (A) lakes (B) car engines (C) sunflowers (D) people

Output: C


Input: Consider Input: Nerves all have (A) microscopic parts (B) short arms (C) viable organs (D) liver transplants

Output: A


Input: Consider Input: Plants might use water and sucrose to create their own (A) provender (B) pandas (C) friends (D) emotions


Output: A