Amy, a 12-year-old girl, developed explosive outbursts shortly after the birth of her baby brother 14 months ago. Every day since the birth of her brother, Amy has been shouting and swearing at her mother in an extremely aggressive manner when her interaction with her mother is interrupted by her brother’s crying and need for attention. In contrast to her behaviour at home, Amy’s teacher as well as her hockey coach, report that she is well behaved at school and on the hockey field. Which aspects of Amy’s case rule out a diagnosis of Disruptive Mood Dysregulation Disorder? a) Amy’s age at onset of the abnormal behaviour. b) The abnormal behaviour has been present for approximately 14 months. c) Her temper outbursts manifest only verbally. d) Her overall mood is not irritable, angry or sad. e) The temper outbursts only manifest at home. f) She has at least one outburst every day.