During auscultation of a patient's chest, you hear coarse crackles throughout both inspiration and expiration. These sound clear when the patient coughs. Which of the following is the most likely cause of these adventitious sounds?
A) opening of closed smaller airways or alveoli
B) opening of collapsed large, proximal airways
C) variable obstruction to flow in the upper airway
D) movement of excessive secretions in the airways
Correct Answer:
Verified
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