28 A 32-year-old female client presents to the PMHNP with reports of mood swings, tearfulness, difficulty concentrating, lack of energy, irritability, and depressed mood. She reports that these symptoms have been occurring monthly for the past year and usually disappears after her menses end. The PMHNP suspects these are symptoms of premenstrual dysphoric disorder. What is the appropriate method of confirming a diagnosis of premenstrual dysphoric disorder? A: Laboratory tests. B: Family history. C: Neuropsychological testing. D: Two or more months of prospective symptom ratings on validated scales.