When Listening to a Patient's Breath Sounds,the Nurse Is Unsure

When listening to a patient's breath sounds,the nurse is unsure about a sound that is heard.The nurse's next action should be to:

A) notify the patient's physician immediately.
B) document the sound exactly as it was heard.
C) validate the data by asking a coworker to listen to the breath sounds.
D) assess again in 20 minutes to note whether the sound is still present.