What is the priority intervention when assessing a client with multi-system trauma?

Airway management with cervical spine stabilization, breathing, circulation, level of consciousness and pupillary response.

Level of consciousness and pupillary response, airway management with cervical spine stabilization, breathing and circulation.

Airway management with cervical spine stabilization, breathing, level of consciousness and pupillary response, and circulation.

Breathing, airway management with cervical spine stabilization, circulation, level of consciousness and pupillary response.