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.

[Q]: The pull of gravity from Earth has the greatest effect on  
 (A) comets. (B) the Sun. (C) asteroids. (D) the Moon.
[A]: D


[Q]: The energy that is stored in food originally comes from  
 (A) air (B) soil (C) sunlight (D) water
[A]: C


[Q]: The solar system containing Earth consists of a sun and planets. Which statement best describes the motion of the planets in our solar system?  
 (A) The planets rotate around the sun. (B) The sun rotates around the planets. (C) The planets revolve around the sun. (D) The sun revolves around the planets.
[A]:
C