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: The energy that is stored in food originally comes from  
 (A) air (B) soil (C) sunlight (D) water

Output: C


Input: Consider Input: Which step will most likely ensure that the results of an investigation are valid?  
 (A) using a computer to graph results (B) verifying that results match the original hypothesis (C) comparing the results with those of other scientists (D) eliminating any results that appear to be abnormal

Output: C


Input: Consider Input: Human activity most likely contributes to which of the following changes on Earth?  
 (A) an increase in the length of a day (B) a decrease in the number of volcanic eruptions (C) a decrease in the magnitude of large earthquakes (D) an increase in the amount of atmospheric carbon dioxide


Output: D