While Caring for a Patient with an Endotracheal Tube, the Nurses

While caring for a patient with an endotracheal tube, the nurses recognizes that suctioning is required how often?

A) Every 2 hours when the patient is awake
B) When adventitious breath sounds are auscultated
C) When there is a need to prevent the patient from coughing
D) When the nurse needs to stimulate the cough reflex