You are given a science question (easy-level) and four answer options (associated with "A", "B", "C", "D"). Your task is to find the correct answer based on scientific facts, knowledge, and reasoning. Do not generate anything else apart from one of the following characters: 'A', 'B, 'C', 'D'. There is only one correct answer for each question.

Input: Consider Input: Which energy source is nonrenewable?  
 (A) sunlight (B) biomass (C) wind (D) fossil fuel

Output: D


Input: Consider Input: Which is the most important safety measure to follow when using an acid in a classroom laboratory?  
 (A) wearing protective clothing and goggles (B) keeping the window open (C) closing the door to the hall (D) using bright fluorescent lights

Output: A


Input: Consider Input: A plant scientist is developing a new fertilizer called Hypergrow. She designs an experiment to test whether Hypergrow helps plants grow faster than Supergrow, a fertilizer already on the market. Which of the following should the scientist do with light during the experiment?  
 (A) Apply the same amount of light to all the plants. (B) Apply only green light to all the plants. (C) Flash the lights to simulate a partly cloudy day. (D) Keep the plants in darkness.


Output: A