A Patient Is Admitted to the Critical Care Unit with Acute

A patient is admitted to the critical care unit with acute respiratory failure secondary to chronic obstructive pulmonary disease.The patient has a 15-year history of emphysema and bronchitis.On inspection, the nurse observes that the patient is experiencing air trapping.While auscultating the chest, the nurse notes the presence of coarse, rumbling, low-pitched sounds in the right middle and lower lobes.On further inspection of the patient, the nurse observes that his fingers appear discolored.This is a result of

A) clubbing.
B) central cyanosis.
C) peripheral cyanosis.
D) chronic tuberculosis.