A young female experienced massive facial trauma and is unresponsive. After several attempts, you are unable to adequately open her airway with the jaw-thrust maneuver. You should.
A. carefully tilt her head back and lift up on her chin.
B. insert a nasopharyngeal airway and apply oxygen.
C. apply oxygen and reattempt the jaw-thrust maneuver.
D. begin assisting her ventilations with a bag-mask device.