A 67-Year-Old Male with a Smoking History of 120-Pack Years

A 67-year-old male with a smoking history of 120-pack years complains of fatigue with exertion, shortness of breath, chronic cough, and wheezing. On physical examination, the patient shows barrel-shaped chest, prolonged exhalation, circumoral cyanosis, and wheezing throughout both lung fields. His heart has a regular rate and rhythm of 80 beats/min. The abdomen is obese and nontender. Extremities show no significant findings. No neurological deficits. Arterial blood gases reveal acidosis. These signs and symptoms are characteristic of:

A) Congestive heart failure
B) Chronic obstructive pulmonary disease
C) Asthma
D) Lung cancer