Monty had surgery to repair a torn ligament in his shoulder. Two weeks after his surgery he was still having pain, so he returned to the doctor's office. X-rays showed a sponge that had been accidently left in his shoulder during surgery. Based on which negligence doctrine would Monty most likely sue?

• Contributory negligence
• Res ipsa loquitur
• Negligenceper se
• Comparative negligence
• Trespass to person