What is the reason for the decrease in the diffusion capacity of the lungs for carbon monoxide?
A. There is decreased fibrosis leading to decreased diffusion of carbon monoxide.
B. The decreased surface area due to alveolar septal destruction leads to a decrease in the diffusion of carbon monoxide.
C. There is decreased compliance leading to a lesser diffusion of carbon monoxide.
D. There is decreased air entry leading to a lesser diffusion of carbon monoxide.
E. There is increased obstruction leading to a lesser diffusion of carbon monoxide.