The Nurse's Friend Is Taking a Benzodiazepine to Help with Anxiety

The nurse's friend is taking a benzodiazepine to help with anxiety. The friend tells the nurse about reading that kava is good for anxiety too, and says, "I bought some at the local health store. After all, it's 'natural'. I'd rather use natural products than a medication to help my anxiety."
The nurse's response should be which of the following?

A) "It's a medicine too and should not be mixed with your other meds."
B) "That's great, I'm glad you're going natural."
C) "Kava is harmless. Good for you to take such initiative."
D) "Have you told your doctor about this? Benzo's can be addictive."