Final answer:
For an 8-year-old patient with high caries risk, the most appropriate recall interval is 3 months, which allows for close monitoring and preventive care.
Step-by-step explanation:
The most appropriate recall interval for an 8-year-old patient with high caries risk is A. 3 months. Dental professionals often recommend more frequent recall appointments for children considered to be at high risk for caries. This helps in monitoring their oral health closely and intervening promptly to prevent the progression of carious lesions.
A shorter recall interval allows for better management of the child's oral hygiene, dietary counseling, and application of preventive measures like fluoride treatments.