Science matter is everywhere

Which of the following would provide the best evidence that air is made of matter?

A. Making a small hole in a tire and measuring the amount of time it takes for it to become flat.

B. Comparing the volume of an empty balloon to the volume of of an inflated balloon.

C. During the temperature of the air in several rooms are varying sizes.

D. Finding the volume of the air between marbles in the jar by putting water over them.