The majority of cases of chronic bronchitis are caused by
A)Asthma
B)Allergies
C)Smoking
D)Fungi

Question

Quizplus · Accepted Answer

The majority of cases of chronic bronchitis are caused by smoking, either directly or secondhand. Other factors such as air pollution and workplace exposure to dust and chemicals can also contribute to chronic bronchitis, but smoking remains the primary cause. Asthma and allergies can also cause bronchitis, but they are not typically chronic. Fungi are not a common cause of chronic bronchitis.

The Majority of Cases of Chronic Bronchitis Are Caused by