In the Lungs,an Example of the Body's Reserve Capacity Is

In the lungs,an example of the body's reserve capacity is that

A) some areas of the lung can be closed off during rest and opened again when needed during exercise.
B) capillary beds in the lungs are reversibly collapsible, allowing blood to be shunted to additional areas during exercise.
C) pulmonary blood flow is completely under the control of the autonomic nervous system, dilating arteries and arterioles to adjust blood flow.
D) All of the statements are true.
E) None of the statements are true.