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: A geologist finds a layer of shale near the surface from a certain time period. Nearby, the geologist finds the same layer of shale, but it is deeper underground than the first layer. What might have caused the difference in the depth of the shale layer?  
 (A) a meteorite (B) a fault (C) ancient fossils (D) animal life

Output: B


Input: Consider Input: A snail's shell provides the snail with  
 (A) food. (B) energy. (C) protection. (D) transportation.

Output: C


Input: Consider Input: Which statement best describes the molecules in a sample of water that was heated from a liquid to a gas?  
 (A) The average size of the molecules decreased. (B) The average size of the molecules increased. (C) The average kinetic energy of the molecules decreased. (D) The average kinetic energy of the molecules increased.


Output: D