. . . . "o is not a participant in the crime; or (c) uses or threatens the use of a dangerous instrument; or (d) displays what is or appears to be a knife, pistol, revolver, rifle, shotgun, machine gun, or other firearm; or (2) the burglary is committed by a person with a prior record of two or more convictions for burglary or housebreaking or a combination of both; or (3) the entering or remaining occurs" . .