You are given a science question (hard-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 the following is the farthest from Earth?  
 (A) Halley's comet (B) the Andromeda galaxy (C) Neptune (D) the Sun

Output: B


Input: Consider Input: Many endangered animals are captured, tagged, and then released back into their environment. The tag may be a piece of coded plastic or metal that is placed somewhere safe on the body. Which is the most likely reason to tag an animal?  
 (A) to monitor their eating habits (B) to monitor their roaming habits (C) to monitor their sleeping habits (D) to monitor their reproductive habits

Output: B


Input: Consider Input: Which of the following can be found on both Earth and the moon?  
 (A) Hills (B) Thick atmosphere (C) Thunderstorms (D) Oceans


Output: A