Which of the Following Must Be Considered During Extrication of an Athlete

Which of the following must be considered during extrication of an athlete from a gymnastics pit?

A) Use of panel mats to move the spine board across unstable surface
B) Moving the spine board across the pit surface, as opposed to carrying the board out of the pit
C) Immobilizing the athlete on the board because manual cervical stabilization may be challenging
D) All of the above