A 7-year-old child is brought in by parents after ingesting an unknown number of paracetamol tablets approximately 3 hours ago. She is asymptomatic. According to Australian paracetamol poisoning guidelines, what is the most appropriate next step?AReassure and discharge as she is wellBMeasure serum paracetamol concentration at 4 hours post-ingestion and use the nomogram to determine need for N-acetylcysteineCStart N-acetylcysteine immediately without any blood testsDDelay assessment until 24 hours to see if symptoms developEGive activated charcoal and no further follow-upCheck my answer