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: Compared to Earth, the Moon is  
 (A) drier. (B) larger. (C) heavier. (D) brighter.

Output: A


Input: Consider Input: Kim lost her hammer outside. When she found it a few months later, some parts of the metal were covered with flaky, brown rust. Which type of change occurred when rust formed on the hammer?  
 (A) chemical (B) electrical (C) thermal (D) physical

Output: A


Input: Consider Input: Which characteristic is most common among animals living in a cold climate?  
 (A) layers of fat (B) thick bones (C) slow digestion (D) large lungs


Output: A