Task: Question Answering
Input (English): A teacher opens a can of food in the front of a classroom. Soon, all of the students in the classroom can smell the food. Which statement identifies a property of a gas that allows all of the students to smell the food?  
 (A) A gas has no mass. (B) A gas has a large mass. (C) A gas takes the shape of its container. (D) A gas keeps its shape when placed in a container.
Output (English): C