Teacher: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).
Teacher: Now, understand the problem? Solve this instance: Paragraph: Because all electromagnetic waves travel at the same speed through space, a wave with a shorter wavelength must have a higher frequency, and vice versa.
 Question: John was looking at the magnetic reader in the lab. What he observed was that as a wave with a shorter wavelength traveled, the frequency became 
 Choices: A)Lower 
B)Higher
Student:
Lower