Which Action Should the RN Who Is Working in the Eye

Which action should the RN who is working in the eye and ear clinic delegate to an LPN/LVN?

A) Use a Snellen chart to check a patient's visual acuity.
B) Evaluate a patient's ability to insert soft contact lenses.
C) Teach a patient with otosclerosis about use of sodium fluoride and vitamin D.
D) Assess the external auditory canal for signs of irritation caused by a hearing aid.