A Patient Was Admitted to the Critical Care Unit After

A patient was admitted to the critical care unit after a left pneumonectomy.The patient is receiving 40% oxygen via a simple facemask.The morning chest radiography study reveals right lower lobe pneumonia.After eating breakfast, the patient suddenly vomits and aspirates.The first action that should be taken after the patient's aspiration event is

A) lavaging his airway with normal saline.
B) placing him on his back in a semi-Fowler position.
C) administering manual ventilations with a resuscitation bag.
D) suctioning his airway.