Task: Question Answering
Input (English): Base your answer on the information below and on your knowledge of science. A baseball strikes the roof of a car and dents it. The paint on the roof begins to crack and chip, exposing the metal. The exposed metal on the roof rusts, eventually causing a small hole in the roof. Which event is a chemical change?  
 (A) The baseball strikes the roof. (B) The roof of the car dents. (C) The paint cracks and chips. (D) The exposed metal rusts.
Output (English): D