A 56-year-old man is complaining of chest pain without respiratory distress. His vital signs show a blood pressure of 146/88, pulse 88, and pulse oximetry reading of 97 percent. How should you treat this patient?

A) Administer oxygen via nonrebreather at 15 liters per minute.
B) Provide oxygen via bag-valvemask at 15 liters per minute.
C) Assure that his airway is secure and monitor his respiratory status.
D) Assist the patient with his metered dose inhaler.

C