A nurse at an ophthalmology clinic is providing teaching to a client who has open-angle glaucoma and a new treatment regimen of timolol and pilocarpine eye drops. Which of the following instructions should the nurse provide?

Rationale: A. The dropper should never touch the eye or surrounding tissues, as this contaminates the medication. B. When more than one type of eye drop is prescribed, they should be administered at least 5 minutes apart to ensure proper absorption and avoid washing the first medication out. C. The correct technique is to apply gentle pressure to the nasolacrimal duct (inner canthus) for 1–2 minutes to reduce systemic absorption, not the conjunctival sac. D. Contact lenses should be removed before instilling eye drops to prevent absorption into the lens and ensure proper drug delivery.