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 star is a large astronomical body that  
 (A) reflects light. (B) condenses light. (C) emits light. (D) absorbs light.
answer:
C


question:
Skunks spray a strong-smelling liquid to ___.  
 (A) get rid of wastes (B) attract prey (C) defend themselves (D) help nearby plants grow
answer:
C


question:
Which of these statements best describes temperature as elevation in the atmosphere increases?  
 (A) Temperature remains constant with elevation in the thermosphere. (B) Temperature remains constant with elevation in the mesosphere. (C) Temperature generally decreases with elevation in the stratosphere. (D) Temperature generally decreases with elevation in the troposphere.
answer:

D