Which of the following BEST defines "rhonchi"?

A
whistling sound that can be heard during auscultation of the lungs
b. An abnormal sound heard during lung auscultation that is caused by air rushing through mucosal secretions in or swollen tissues of the bronchioles
c. Vibrations that can be felt externally when breathing or speaking
d. A crackling or grating sound; in the lungs, associated with lung disease

B