The correct option is B Boyle's law
Boyles' law states that for a fixed mass of a perfect gas, at constant temperature, the product of its pressure and volume is always a constant. In other words, at constant temperature, gases occupy lesser volume for higher pressure.
At the sea level, the air is denser due to the high pressure. Higher density indicates a lower volume as density is inversely proportional to it. Therefore, the given case is an implication of Boyle's law.