What happens to the thickness of the respiratory membrane in a patient with pulmonary edema?

B. thickness increases since mucus is produced and covers the membrane
Pulmonary edema is is an abnormal accumulation of fluid beneath the skin, or in one or more cavities of the body.

It would be safe to assume that the respiratory membrane of the patient is filling up with fluid (as in pneumonia) and the membrane will increase (as in pneumonia)