TASK DEFINITION: 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.
PROBLEM: A girl signals her friend by shining a flashlight on a mirror. Her friend can see the signal because  
 (A) heat energy can be transferred from one object to another (B) mechanical energy can be transferred from one object to another (C) sound energy can be reflected from one object to another (D) light energy can be reflected from one object to another

SOLUTION: D

PROBLEM: Which two things interact most in the water cycle?  
 (A) oceans and the Moon (B) oceans and the Sun (C) lakes and the Moon (D) lakes and the Sun

SOLUTION: B

PROBLEM: A student rolls a ball on the ground. Which of these causes the ball to slow down and then stop?  
 (A) The motion of the ball (B) The speed of the ball (C) Friction from the ground (D) A magnetic field

SOLUTION:
C