You are the first to arrive at the scene of a motorcycle accident where the rider is unconscious on the road. After ensuring the scene is safe, what is the most critical immediate action you should take?
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A
Move the motorcycle off the road to prevent traffic obstruction.
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B
Check the rider for breathing and call for an ambulance.
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C
Immediately remove the rider's helmet to check for head injuries.
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D
Attempt to give the unconscious rider some water.