Answer:
That Troy's own negligence contributed to the injury.
Explanation:Negligence is a term used to describe the failure of a person, group of persons or an organisation to take adequate care and action required to prevent a loss or an injury, especially when the person,group of persons or Organisation have the opportunity to do so.
UNDER THE CONTRIBUTORY NEGLIGENCE RULE JERRY CAN ESCAPE LIABILITY IF HE CAN BE ABLE TO PROVE THAT TROY'S OWN NEGLIGENCE CONTRIBUTED TO THE INJURY.