After Auscultating a Coarse Low-Pitched Sonorous Rattling in the Left

After auscultating a coarse low-pitched sonorous rattling in the left lower lobe,the nurse is concerned that the patient may be developing:

A) an accumulation of secretions in the larger air passages.
B) narrowing in the lower lobe of the lung.
C) irritation in the pleurae.
D) crackles in the left lower lobe.