Upon Auscultation of the Chest, the Nurse Reports to the Preceptor

Upon auscultation of the chest, the nurse reports to the preceptor what is heard. Which of the following statements should cause the preceptor to be most concerned?

A) "I heard crackles earlier, but now I am not able to hear anything."
B) "I hear wheezing in the right lobes, but clear on the left."
C) "There are course crackles that clear with coughing."
D) "The patient was clear, but now there are scattered wheezes bilaterally."