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1. A condition in which inflammation causes the bronchi to swell and the airways to narrow. It is caused by abnormal cells growing without control.​

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Answer:

BRONCHITIS

Explanation:

Bronchitis is an inflammation of the lining of your bronchial tubes, which carry air to and from your lungs. People who have bronchitis often cough up thickened mucus, which can be discolored. Bronchitis may be either acute or chronic.

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