A mother brings her 3-year-old child to the clinic for a well-child checkup. The child has not been to the clinic since 6 months of age. The nurse determines that which of the following is the priority care for this client?

Rationale: A. Hearing screening is important, but not the immediate priority in a child who has missed routine visits. B. Dental care should begin early, but updating immunizations takes precedence to prevent serious communicable diseases. C. Updating vaccinations is the priority because the child is significantly behind on the recommended immunization schedule, placing them at risk for preventable infections. D. Growth and development assessment is essential but can be done after addressing the urgent need for immunization.