A nurse is caring for a 5-year-old child who is postoperative following a tonsillectomy. Which of the following pain scales should the nurse use to determine the child's pain level?

A. FLACC – Used for infants or non-verbal children. B. The FACES scale allows children to express their pain visually. C. Visual Analog Scale – More appropriate for older children or adults. D. Oucher – Used for children but less commonly than FACES.