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.

Ex 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

Ex Output:
B


Ex Input:
A student tosses a ball into the air. Which force causes the ball to fall back to the ground?  
 (A) gravity (B) magnetism (C) mechanical (D) friction

Ex Output:
A


Ex Input:
How does the Sun power the water cycle?  
 (A) Energy from the Sun evaporates water. (B) Energy from the Sun condenses water. (C) Energy from the Sun precipitates water. (D) Energy from the Sun collects water.

Ex Output:

A