A 16-year-old has suffered a thoracic-level spinal injury from a diving accident. To initiate CPR at the poolside, which measure would be most important? A) Hyperextend the neck to clear the airway prior to mouth-to-mouth resuscitation.
B) Administer cardiopulmonary resuscitation in a prone position.
C) Do not administer CPR after a head injury.
D) Elevate the mandible to assess airway with the head in a neutral position.