A Patient Who Has HIV Asks the Nurse About Taking

A patient who has HIV asks the nurse about taking echinacea to improve immune function.What will the nurse tell this patient?

A) "The root extract is useful for treating upper respiratory and urinary tract infections."
B) "This use is currently being studied in patients who have HIV."
C) "Use it as needed when antibiotics fail to treat your infections."
D) "You may use it safely up to 8 weeks at a time as a preventive medication."