A 32-Year-Old Man Sees the Doctor Because of Chronic Bronchitis

A 32-year-old man sees the doctor because of chronic bronchitis.He used to smoke one pack of cigarettes per day for about 10 years but gave up smoking 5 years ago because of a persistent cough.Breath sounds suggest the presence of lung emphysema.The plasma protein that is most likely to be reduced in this patient is:

A) g-Globulins.
B) a1-Antiprotease.
C) Ceruloplasmin.
D) Fibrinogen.
E) Haptoglobin.