Given the task definition and input, reply with output. You are given a short paragraph, a question and two choices to answer from. Choose the correct answer based on the paragraph and write the answer(not the key).

Paragraph: The more dense the medium, the slower the light moves.
 Question: John was looking at the lights passing through the object. He noticed that the less dense the medium, the light would move 
 Choices: A)Faster 
B)Slower
Faster