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 Q]: Two identical books are on opposite ends of a table. Which of these would increase the gravitational force exerted between the two books?  
 (A) decrease the distance between the books (B) decrease the mass of the books (C) decrease the mass of the table (D) decrease the temperature in the room
[EX A]: A

[EX Q]: Animals get energy for growth and repair from  
 (A) soil (B) food (C) water (D) air
[EX A]: B

[EX Q]: What repeating cycle is responsible for the four seasons that occur on Earth?  
 (A) rotation of the moon (B) rotation of the Sun (C) revolution of the sun in the galaxy (D) revolution of the earth about the sun
[EX A]:
D