Task: Question Answering
Input (English): Missy and Ethan discussed examples of the types of changes in matter. In which example is a chemical change taking place?  
 (A) A piece of metal is cut in half. (B) An ice cube melts on a counter. (C) A camper roasts marshmallows over a burning fire. (D) A baker mixes together flour and sugar to make dough.
Output (English): C