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: The more efficient a device is, the greater the percentage of usable energy it produces.
Question: Theresa made a device that uses 25% of usable energy. Ryan made a device that uses 10% of usable energy. _____ made a device that is less efficient.
Choices: A)Theresa
B)Ryan
Ryan