An Older Patient Is Concerned Because the Eyes Are Dry

An older patient is concerned because the eyes are dry and feel gritty.What should the nurse respond to this patient's concern?

A) "This is because the eyelids lose elasticity with aging."
B) "This is because the arteries in the eyes narrow with aging."
C) "This is an emergency and needs to be treated immediately."
D) "This is because the tear glands and conjunctiva don't lubricate the eye as well with aging."