Task: Question Understanding
Input (English): Question: Otto pushed a toy car across a floor. The car traveled fast across the wood, but it slowed to a stop on the carpet. Which best explains what happened when the car reached the carpet? (A) Inertia decreased. (B) Gravity increased. (C) Friction increased. (D) Magnetism decreased.?
Output (English): pushed, fast, slowed, stop, carpet., explains, happened, car, reached, carpet?