Angie's angry boss wears a particular type of cologne. one day, angie was at the mall when she smelled the same cologne. the smell produced a momentary feeling of uneasiness. in this example, what is serving as the unconditioned stimulus?'

The perfume serves as the unconditioned stimulus. Angie has subconsciously associated the smell of the cologne with her boss' anger. As a result, whenever she smells the cologne, a reaction of discomfort has been linked to that particular scent.