Which Precaution Is Most Important for the Nurse to Teach

Which precaution is most important for the nurse to teach a patient who is prescribed any type of eye drug administered as eye drops?

A) Apply only the number of drops prescribed.
B) Stop the drug immediately if eye redness occurs.
C) Wear dark glasses for 1 hour after placing the eye drops.
D) Apply pressure to the corner of the eye after the drug has been placed.