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: About how long is a lunar cycle?  
 (A) 1 day (B) 1 week (C) 28 days (D) 52 weeks

Output: C


Input: Consider Input: Which of these statements about nonrenewable resources is true?  
 (A) They are inexpensive. (B) They help keep the air clean. (C) They can take millions of years to form. (D) They are used because they are easily removed from the ground.

Output: C


Input: Consider Input: Hector's class is counting the number of ducks in a pond. Hector counts a different number than the rest of the class. Which of the following actions should Hector most likely perform?  
 (A) keep the result (B) change the number he counted (C) think that the class results are wrong (D) remove his number from the class result


Output: A