For Air to Enter the Lungs During Inhalation

For air to enter the lungs during inhalation

A) the pressure inside the lungs must become lower than the atmospheric pressure.
B) the pressure inside the lungs must be higher than the atmospheric pressure.
C) the pressure inside the lungs must be equal to the atmospheric pressure.
D) the size of the lungs must be decreased.
E) the diaphragm has to be relaxed.