A patient has fallen down a flight of stairs, and is now restless and confused. His airway is open, and he is adequately breathing, 22 times per minute, with a pulse oximetry reading of 90%. He has a radial pulse of 92 beats/min, which is moderate in strength. Emergency Medical Responders are maintaining manual spine motion restriction. What should your next action be?

A) Check the blood pressure and assess for injuries causing blood loss
B) Administer supplemental oxygen
C) Insert an oral airway and start positive pressure ventilation
D) Complete spinal motion restriction interventions by placing the patient on a long spine board with a cervical collar applied, and then applying straps

B) Administer supplemental oxygen