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: Electromagnetic waves with shorter wavelengths have higher frequencies and more energy.
 Question: If Jim shortens the wavelength of the electromagnetic waves his machine is producing, what happens to the energy output? 
 Choices: A)it increases 
B)it decreases
A:
it increases