Instructions: You are given a question or fill-in-the-blank question, two answer options (Option1 and Option2) and an Explanation. Your task is to find the correct answer (return the string of the correct option, not option1/2) for the given question from the given options and using explanation.
Input: Question: John was looking at the lights passing through the object. He noticed that the more dense the medium, the light would move 
 Option1: Faster 
 Option2: Slower 
 Explanation: The more dense the medium, the slower the light moves.
Output:
Slower