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: For a given medium, sound waves travel more slowly at lower temperatures.
 Question: John was watching the sound waves in his electronic monitor when he noticed something. The speed of the sound waves was faster when the temperature was 
 Choices: A)higher 
B)lower
Output:
higher