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 animals has a young form that looks the most like the adult form?  
 (A) moth (B) human (C) frog (D) butterfly
answer:
B


question:
In the morning, students observed puddles of water all over the playground. What would best explain why the playground was dry in the afternoon?  
 (A) Animals drank the water. (B) The wind stopped blowing. (C) Someone dried the puddles. (D) The water evaporated during the day.
answer:
D


question:
One function of the circulatory system is to carry cellular nutrients to the body. Which part of the circulatory system is responsible for exchanging nutrients and wastes?  
 (A) arteries (B) capillaries (C) heart (D) veins
answer:

B