In which situation does a burglary become a robbery? A thief breaks into a convenience store after hours, breaks into the safe, but sets off an alarm when exiting.
A neighbor calls the police, who respond and apprehend a thief in the house next door.
A homeowner awakes, goes downstairs, and is confronted by a thief.
A thief contacts his buddies, who join him in stealing items from a vacant house.