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 of these elements is found in the greatest amount in organisms?  
 (A) carbon (B) iron (C) lead (D) neon

Output: A


Input: Consider Input: Why should plants be included in investigations about the water cycle?  
 (A) Plants speed up the water cycle by removing carbon from the air. (B) Plants start the water cycle when they make water in photosynthesis. (C) Plants are part of the water cycle through the process of transpiration. (D) Plants stop the water cycle because they absorb it and stop the flow to streams.

Output: C


Input: Consider Input: The tops of some mountains are sharp and pointed, while the tops of others are smooth and rounded. This difference was most likely caused by  
 (A) rivers flooding along a coastal plain. (B) erosion and weathering. (C) earthquakes and waves. (D) rocks melted underground by lava.


Output: B