Detailed 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).
Q: 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: Compared to microwaves do x-rays, which have a much higher wavelength than microwaves, have a 
 Choices: A)lower frequency? 
B)higher frequency
A:
lower frequency?