Task: Question Answering
Input (English): 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?  
 (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.
Output (English): A