You are dispatched to an unresponsive 22-year-old female patient. Upon arriving at the scene you find the patient sitting in an easy chair and breathing at 4 times per minute. You should:
a. Administer oxygen through a non-rebreather at 12-151pm.
b. Provide ventilation with a BVM and supplemental oxygen.
c. Begin chest compressions at a ratio of 30 to 2.
d. Insert a nasopharyngeal airway and reassess.