Select the gas law and explanation that best describes the phenomenon that the traveler experienced on the plane.
A. Charles's law: as the pressure of a gas decreases, the volume decreases
B. Gay-Lussac's law: as the pressure of a gas increases, the volume increases
C. Boyle's law: as the pressure of a gas increases, the volume decreases
D. Graham's law: as the pressure of a gas decreases, the volume decreases