Jenny asked a neighbor, tom, to water her flowers while she was on vacation. for three days, tom did this without incident, but on the fourth day, when he touched the outside faucet, he received a violent electric shock that shot him through the air, melted his sneakers and glasses, set his clothes on fire, and seriously burned him. tom sued, claiming that jenny had caused his injuries by negligently repairing a second-floor toilet. water from the steady leak had flooded through the walls, soaking wires and eventually causing the faucet to become electrified. what is the one (and only one) element of negligence law that will allow jenny to win her case in a move for summary judgment?