A newly licensed nurse working at an HIV clinic is reviewing the responsibilities of her position at the clinic. Which of the following tasks should the nurse identify as tertiary prevention?

A. Tertiary prevention focuses on managing existing disease and preventing complications, such as adherence to HIV medications. B. Understanding health screenings relates to secondary prevention (early detection). C. Promoting exercise is a primary prevention measure to prevent diseases. D. Educating about contraindications for immunizations is primary prevention.