A nurse is collecting data from a 6-week-old infant. Which of the following findings should the nurse expect?

A. Absence of Moro reflex: The Moro (startle) reflex is expected to be present in a 6-week-old infant. It typically disappears around 4 to 6 months of age. Its absence at this stage could indicate a neurological concern. B. Closure of the anterior fontanel: The anterior fontanel usually closes between 12 to 18 months of age. It remains open at 6 weeks to allow for brain growth, so closure at this point would be premature. C. Absence of Babinski reflex: The Babinski reflex is expected to be present in infants until around 12 months of age. Absence of this reflex at 6 weeks is abnormal and could suggest neurological dysfunction. D. Closure of the posterior fontanel: The posterior fontanel normally closes between 6 to 8 weeks of age. Closure at 6 weeks is an expected and normal finding in a developing infant.