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:
An object such as a hammer weighs less on the Moon than on Earth. This is because the Moon has a  
 (A) thinner atmosphere than Earth. (B) smaller diameter than Earth. (C) stronger magnetic field than Earth. (D) lower mass than Earth.
answer:
D


question:
A student pushes a box to slide it across the floor. Which statement explains why the box begins to move?  
 (A) The weight of the box is greater than the force of friction. (B) The weight of the box is less than the force of friction. (C) The applied force is greater than the force of friction. (D) The applied force is less than the force of friction.
answer:
C


question:
Which concept supports the endosymbiotic origin of complex, eukaryotic double-membrane structures?   
 (A) Mitochondria and chloroplasts arise from preexisting mitochondria and chloroplasts. (B) Mitochondria and chloroplasts arise from preexisting endomembrane systems. (C) Mitochondria and chloroplasts are synthesized in the nucleus. (D) Mitochondria and chloroplasts are synthesized in ribosomes.
answer:

A