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: Riding a two wheeled human powered vehicle is good for the environment because (A) it runs without fuel (B) it helps people stay in shape (C) they are cheaper to maintain (D) they are more fun to drive

Output: A

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: What best describes the relationship with the moon, Earth, and the sun? (A) the Earth is absorbing sunlight (B) the moon is equidistant from the sun and Earth (C) the moon is a star (D) the sun travels around the Earth
Output: A