When Auscultating the Lungs of an Adult Patient,the Nurse Notes

When auscultating the lungs of an adult patient,the nurse notes that over the posterior lower lobes,low-pitched,soft breath sounds are heard,with inspiration being longer than expiration.The nurse is aware that these are:

A) sounds normally auscultated over the trachea.
B) bronchial breath sounds and are normal in that location.
C) vesicular breath sounds and are normal in that location.
D) bronchovesicular breath sounds and are normal in that location.