At the Local Skateboard Park, a Skater Takes a Header

At the local skateboard park, a skater takes a header in the half pipe. He didn't have a helmet on, and is lying on his back confused and not able to move. As a First Aider, you should:

A) drag him off the half pipe and take him by car to the hospital.
B) not move the victim, call 911, and stabilize his head and neck in a neutral in-line position.
C) roll him on his side in case he vomits.
D) roll him onto a piece of plywood and take him to the hospital in a pickup truck.