What properties of matter allow the gas to expand and contract as the wall is removed and the piston moved as depicted in the image?
A.The particles of a gas are close together, they take the shape of the container, they are strongly attracted to each other.
B.The particles of a gas are close together, they take the shape of the container, they are weakly attracted to each other.
C.The particles of a gas are close together, they completely fill the volume of the container, they are strongly attracted to each other.
D.The particles of a gas are very far apart, they completely fill the volume of the container, they are weakly attracted to each other.