Salesman: "The revolutionary new Shepherd's Gate Protection System represents the latest in sheep-tending technology! The built-in sensors recognize the scent of predators from miles around. When your flock is in danger of attack, the electronic gates surrounding the flock will quickly slam shut, keeping any unwanted animals away, and your flock safer than ever! Sure, the system is prone to false alarms, but you know what they say: Better safe than sorry!"
Which one of the following, if true, most strengthens the salesman's argument?
A. Sheep cannot be injured by the electronic gates when they quickly slam shut.
B. Similar electronic protection systems are currently used to protect cattle from attack by predators.
C. Roughly half the time, when the gates close automatically, it's because of a false alarm.
D. Some sheep predators have been hunted almost to extinction.
E. Flocks of sheep are rarely attacked by predators.
