Final answer:
For medication prescribed QID, the nurse should administer it at equally spaced intervals throughout the day.
Step-by-step explanation:
If a medication is prescribed to be given QID (four times a day), the nurse should use a schedule that includes four equally spaced administration times throughout the day. Option A, which includes administration times at 0800, 1200, 1600, and 2000, is the correct schedule for this prescription.