EMS arrives with a 17-year-old restrained driver involved in a high-speed motor vehicle crash. The patient is immobilized on a backboard and is complaining of abdominal pain. He has multiple lacerations on his left arm. Vital signs prior to arrival: BP 102/60; HR 86, RR 28, SpO₂ 96%.
What should be the next step in the assessment and management of this patient?
A. Perform a secondary survey to assess for other injuries
B. Give the patient pain medication
C. Remove the patient from the backboard and assess the abdominal pain
D. Start an IV and administer fluids