As you enter a room for an unknown medical emergency, you find an unresponsive male with snoring respirations lying supine in bed. Which action should you take immediately?

A) Take manual spinal motion restriction precautions
B) Perform a head-tilt, chin-lift maneuver
C) Start positive pressure ventilation
D) Suction the airway of fluids

B) Perform a head-tilt, chin-lift maneuver