An 87-year-old man has had three episodes of pneumonia over the last 6 months, one requiring admission. He has had increasingly bad breath over this time period. CBC, electrolytes, and liver function tests are all normal. Chest X-ray shows scarring of the right lung base. Diagnosis?
A) Chronic obstructive pulmonary disease (COPD)
B) Bronchiectasis
C) Aspiration pneumonia
D) Lung abscess