Final answer:
Bryant's situation of wetting his underpants during the day at recess is diagnosed as Enuresis, diurnal only, which is the involuntary urination during waking hours.
Step-by-step explanation:
The proper diagnosis for Bryant, a 7-year-old boy who frequently wets his underpants when playing outside at recess, is b) Enuresis, diurnal only. Enuresis refers to the repeated inability to control urination, and when it occurs during waking hours, it is termed diurnal enuresis. This contrasts with nocturnal enuresis, which occurs during sleep. Encopresis, on the other hand, refers to soiling or defecation in inappropriate places, generally associated with constipation and overflow incontinence or without these symptoms. Therefore, since Bryant's issue relates to urination and not to defecation, enuresis is the appropriate term to describe his condition.