You are given a science question (hard-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: One example of a living thing is  
 (A) air (B) water (C) a rock (D) a worm

Output: D


Input: Consider Input: A student plants rosebushes in her front yard. The student is frequently seen pulling weeds from the base of the rosebushes. What is the most likely reason that the weeds are pulled?  
 (A) Weeds add fertilizer to the soil. (B) Weeds use nutrients the roses need to grow. (C) Weeds increase the bacteria in the soil. (D) Weeds consume most of the oxygen.

Output: B


Input: Consider Input: What atoms combine to make up a molecule of water? 1. 1 hydrogen, 1 oxygen 2.  
 (A) hydrogen, (B) oxygen (C) 2 hydrogen, 1 oxygen (D) 2 hydrogen, 2 oxygen


Output: C