Given the task definition and input, reply with output. 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).

Paragraph: Electromagnetic waves with shorter wavelengths have higher frequencies and more energy.
 Question: If Mona is manipulating the wavelengths of her microwave, what happens when she makes the wavelengths longer? 
 Choices: A)energy decreases 
B)energy increases
energy decreases