instruction:
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.
question:
Which of these cycles takes 24 hours?  
 (A) Earth rotating on its axis (B) Earth revolving around the Sun (C) the Moon rotating on its axis (D) the Moon revolving around Earth
answer:
A


question:
Water at 20°C in an uncovered pan is evaporating very slowly. What could be done to the water to make it evaporate more quickly?  
 (A) Cover it. (B) Heat it. (C) Place it in the dark. (D) Put salt in it.
answer:
B


question:
The motion of a car accelerating in a straight line differs from the motion of a car moving in a straight line at a constant speed. Which change best describes acceleration of a car?  
 (A) a change in the direction of the car (B) a change in the distance the car travels (C) the change in velocity divided by the time for that change (D) the change in the time for the car to travel a distance
answer:

C