Task: Question Answering
Input (English): A group of workers needs to move a piano from the second floor of a building. The piano is too wide to fit through the door, so they will lower the piano to the ground through a window. Which tool would be best to help the workers lower the piano from the window?  
 (A) wheel and axle (B) inclined plane (C) pulley (D) wedge
Output (English): C