Task: Question Answering
Input (English): Robert is thinking about buying a new refrigerator. His old refrigerator runs at about 43% efficiency. Which most likely accounts for the remaining 57% of the energy?  
 (A) It is used up by the light in the refrigerator. (B) It is released to the surroundings as heat. (C) It is converted into mechanical energy. (D) It stored as a form of potential energy.
Output (English): B