A nurse is collecting data from a 4-month-old infant at a well-child visit. For which of the following findings should the nurse notify the provider?

A. Incorrect. The closure of the posterior fontanel by 23 months is a normal developmental milestone. B. Correct. The anterior fontanel typically closes by 12 to 18 months of age. If it closes prematurely, it could be a sign of craniosynostosis and should be assessed by the provider. C. Incorrect. Rolling from the back to the abdomen is a normal developmental milestone at around 46 months of age. D. Incorrect. Moving objects to the mouth is a normal developmental behavior in infants as they explore their environment through sensory input.