Derek's Moods Have Always Seemed to Be Unpredictable and Irrational

Derek's moods have always seemed to be unpredictable and irrational. Nancy, who has been diagnosed with generalized anxiety disorder, never knows when he is going to come home and yell at her and the kids. In family therapy it is revealed that Derek's moods are really not irrational, but a reflection of the day's sales at his store. Which of the following would be most likely to decrease Nancy's anxiety?

A) Derek could call home each day and let Nancy know how the day went.
B) Derek should sell the business.
C) Derek can commit more money to advertising so as to increase sales.
D) Derek and Nancy should separate.