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:
Earth is about 81 times more massive than the Moon. How will the mass and weight of a rocket on the Moon compare to its mass and weight on Earth?  
 (A) The mass and weight will be less on the Moon. (B) The mass and weight will be greater on the Moon. (C) The mass will be the same, but its weight will be less on the Moon. (D) The mass will be the same, but its weight will be greater on the Moon.
answer:
C


question:
Which difference between water and ice results in ice floating on cold water?  
 (A) heat (B) shape (C) density (D) volume
answer:
C


question:
An athlete is running a race. The athlete's body needs energy. Which organelle(s) in the athlete's cells supply the energy for cellular functions?  
 (A) Golgi apparatus (B) mitochondrion (C) ribosome (D) nucleus
answer:

B