Question: An astronomer is studying two stars that are the same distance from Earth. Star X appears brighter than star Y. Which statement best explains this observation?

  Options: 
 A. Star X is larger than star Y.
 B. Star Y is larger than star X.
 C. Star X reflects the Sun’s light better than star Y.
 D. Star Y reflects the Sun’s light better than star X. 
Answer: A