Which of the description about chronic bronchitis is wrong?
A.
Pathologic examination shows hypertrophy of mucous glands in the trachea and bronchi.
B.
Air pollutants is the most important risk factors of chronic bronchitis.
C.
Chronic bronchitis shows chronic inflammation, bronchiolar wall fibrosis and coexistent emphysema.
D.
Chronic bronchitis can complicated with pulmonary hypertension.