Definition: 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: A: As the car approaches the radar gun, the reflected microwaves get bunched up in front of the car. Therefore, the waves the receiver detects have a higher frequency than they would if they were being reflected from a stationary object. The faster the car is moving, the greater the increase in the frequency of the waves.
 Question: The cop shot the radar gun at the super fast car, which _____ the waves. 
 Choices: A)increased 
B)decreased
Output:
increased