Instructions: 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).
Input: Paragraph: The more dense the medium, the slower the light moves.
 Question: If Mona shines a light through both wool and cotton and determines that cotton is less dense then wool, which material will the light move faster through? 
 Choices: A)wool 
B)cotton
Output:
cotton