Answer:
B. The gas changes shape and volume to fit the container.
Step-by-step explanation:
Fluids are substances which can flow and which do not have a definite shape but take up the shape of their container. Gases are fluids and so do not have a fixed shape. Gases also do not have fixed volumes but are compressible since the distances between molecules are large due to the negligible force of attraction between the molecules.
Therefore, if a container filled with air is crumpled, the molecules of the gas will take up the new shape of the container. Also, since air is compressible, its volume will change to the new volume of the container.