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.

Example Input: Historically, how has the compass been used?  
 (A) for navigation (B) to predict weather (C) to measure temperature (D) for mineral identification
Example Output: A

Example Input: Which of these best describes wind energy?  
 (A) limited (B) renewable (C) damaging (D) inexpensive
Example Output: B

Example Input: A model of Earth would be different from a model of the Moon because the Moon model would be  
 (A) shinier (B) heavier (C) smaller (D) rougher
Example Output:
C