Your patient is the 18-year-old male driver of a vehicle that struck a tree. He is conscious and complaining of neck pain. The passenger is obviously dead. You have performed your primary assessment. Which of the following is the next step?

A) Perform a rapid trauma assessment.
B) Perform a tertiary assessment.
C) Immobilize the patient on a long backboard and perform a detailed examination in the ambulance.
D) Rule out the possibility of cervical spine injury before moving the patient.

A