A nurse is caring for a 6-month-old infant who is postoperative following a myringotomy. Which of the following pain scales should the nurse use to determine the infant's pain level?

A. The Oucher scale is a self-report pain scale appropriate for children 3 years and older who can point to a face that matches their pain intensity. B. The FACES scale also relies on self-report and is best suited for children 3 years and older. C. The FLACC scale (Face, Legs, Activity, Cry, Consolability) is an observational pain assessment tool used for infants and young children who are unable to verbalize their pain, such as a 6-month-old. D. The Visual Analog Scale requires the child to mark a point on a line to indicate pain intensity and is appropriate for older children and adults.