As you approach a motorcyclist who was thrown from his bike, you hear him saying that he cannot feel or move his legs. You note obvious deformity to both femurs as well as his left wrist and forearm. Emergency Medical Responders are holding manual in-line spinal stabilization. Of the following, which should be done first?

A) Check for motor function and sensation in the feet.
B) Expose the legs and look for bleeding.
C) Check his rate and effort of breathing.
D) Place a cervical collar and administer oxygen.

C