A 30-year-old client with a history of depression returns to the mental health clinic for follow-up care. She takes $100 \mathrm{mg}$ of sertraline daily. In addition, she states she tries to stay mentally and physically well by taking yoga classes, walking regularly, and taking vitamins and St. John's wort. She also relates that she is a lacto-ovo-vegetarian and gets most of her protein from cheese. Given this information, what should the nurse tell the client?
a. "Avoid cheese. In conjunction with your medication, it can precipitate a severe hypertensive reaction.”
b. "You're doing a great job taking care of yourself. You've made several healthy lifestyle choices.”
c. "Stop taking St. John's wort. In conjunction with your medication, it can precipitate a serious reaction called serotonin syndrome.”
d. "You're doing a great job with your lifestyle choices. Do more intensive aerobic exercise, which has been shown to stabilize mood."