A nurse is completing a pain assessment on an infant. Which of the following pain scales should the nurse use?

Rationale: A. The Non-communicating Children’s Pain Checklist is best for children with cognitive impairments, not infants. B. The FACES pain scale requires the child to select a facial expression that matches their pain, which is appropriate for children ≥3 years old, not infants. C. The Oucher scale also requires self-reporting and is suitable for children ≥3 years old. D. The FLACC scale (Face, Legs, Activity, Cry, Consolability) is designed for infants and young children who cannot self-report pain, making it the most appropriate tool in this case.