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:
A bright object with a long tail of glowing gases is in orbit around the Sun. This object is most likely  
 (A) a planet (B) a star (C) an asteroid (D) a comet
answer:
D


question:
Which of the following helps the body to cool down?  
 (A) shivering (B) sweating (C) running a fever (D) taking deep breaths
answer:
B


question:
Many insects go through metamorphosis. Which series shows the stages of complete metamorphosis correctly?  
 (A) egg, nymph, pupa, adult (B) egg, larva, nymph, adult (C) egg, nymph 1, nymph 2, adult (D) egg, larva, pupa, adult
answer:

D