A 68=year-old man,with chronic cough and sputum production for 17 years,had felt a progressive dyspnea slnce 3 years. His chest X-ray film showed overinflation of lungs and descended diaphragms. The peripheral vasculature of the lungs was diminished. Which dis-ease the patient suffered from most possibly（）

A . Pulmonaryemphysema

B . Chronicpulmonaryheartdisease

C . Pulmonaryarterialhypertension

D . Asthma

E . Bronchoectasis