Question: 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?

  Options: 
 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. 
Answer: C