The nurse hears crackles when auscultating a client's lung sounds. Which is an accurate description of the sound of crackles?

A. A bubbling sound heard during inspiration and expiration in the central airways: This description is accurate. Crackles (also called rales) are often heard in conditions like pulmonary edema or pneumonia.B. A crowing noise heard during inspiration over the trachea: This description refers to stridor, not crackles. Stridor occurs due to upper airway obstruction.C. Popping, non-musical sounds heard in the lung bases, usually during inspiration: This description is accurate for crackles. They occur due to fluid or secretions in the alveoli.D. Superficial squeaking or grating sounds heard during inspiration and expiration: This description refers to wheezes, not crackles. Wheezes are associated with narrowed airways.