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: Water vapor sometimes condenses into stratus clouds that are in contact with the ground. What forms as a result of this process?  
 (A) ozone (B) methane (C) fog (D) smoke

Output: C


Input: Consider Input: Which of the following correctly lists the organizational hierarchy of organisms from simplest to most complex?  
 (A) cells, organs, tissues, organ systems, organisms (B) cells, tissues, organs, organ systems, organisms (C) tissues, cells, organs, organ systems, organisms (D) tissues, organs, cells, organ systems, organisms

Output: B


Input: Consider Input: What is the main reason humans need nitrogen to survive?  
 (A) Nitrogen is used in respiration to generate energy. (B) Nitrogen is used in making the proteins in the body. (C) Nitrogen is used to help the body eliminate wastes. (D) Nitrogen is used by nerve cells to conduct impulses.


Output: B