Identify One or More Choices That Best Complete the Statement

Identify one or more choices that best complete the statement or answer the question.
-A 17-year-old patient with influenza tells the nurse, "I can't believe I got sick. I've been taking vitamin C, vitamin D, echinacea, and some other herbal remedies to boost my immune system." Which should the nurse say in response to this patient? Select all that apply.

A) "You probably weren't taking enough of the supplements."
B) "Those supplements help with focus and attention, not disease prevention."
C) "The safe use of supplements and herbs has not been determined."
D) "The vitamins you were taking may have reduced the effectiveness of the herbs."
E) "The effectiveness of supplements and herbs against influenza has not been determined."