A 68-year-old patient with shortness of breath is referred for pulmonary function testing, including lung volumes, flow-volume curves, and lung compliance. Which of the following statements best characterizes lung compliance?
a. It decreases with advancing age.
b. It increases when there is a deficiency of surfactant.
c. It increases in patients with pulmonary edema.
d. It is equivalent to ∆P/∆V.
e. It is inversely related to the elastic recoil properties of the lung.