A 17-year-old girl presents 3 hours after intentionally ingesting 40 tablets of 500 mg acetaminophen (total 20 g). She is well-appearing and has no abdominal pain. What is the most appropriate next step?AReassure and discharge because she is asymptomaticBDraw a serum acetaminophen level at 4 hours post-ingestion and start N-acetylcysteine if the level plots above the treatment line on the nomogramCWait 24 hours before checking any levelsDAdminister charcoal only and no antidoteEDelay treatment until liver enzymes riseCheck my answer