What Should a Nurse Tell Any Client Who Plans to Use

What should a nurse tell any client who plans to use essential oils for aromatherapy?

A) Test for possible allergies by putting one drop of oil on the tongue.
B) Nothing should be mixed with the oils,as this will lessen the effect.
C) If pregnant,consult a health care practitioner before using the oils.
D) Tell the client that the oils only provide a psychological benefit.