The correct answer is A) Prick the skin of the hands and the soles of the feet with a sharp object to check for reaction. This is the correct procedure for checking for spinal cord damage in an unconscious patient. By pricking the skin of the hands and feet, you can assess the patient's sensory responses and determine if there is any damage to the spinal cord. This is a standard technique used by medical professionals to quickly evaluate the patient's neurological status. The other options are incorrect because they do not represent the proper assessment for suspected spinal cord injury. Rolling the patient onto their stomach or pressing along the spine could further injure the patient if there is a spinal fracture. Selectively raising the limbs would not provide a comprehensive evaluation of the spinal cord.