After a Year-Long Drought,the City of Pine Bluffs Has Banned

Multiple Choice

After a year-long drought,the city of Pine Bluffs has banned all lawn sprinkling.Many residents believe,however,that continued watering of their own lawn will have little effect on total water reserves.Consequently,there is a disastrous drain on city water reserves caused by widespread illegal sprinkling.This incident best illustrates the dynamics of

A) a reciprocity norm.
B) social traps.
C) the bystander effect.
D) diffusion of responsibility