A nurse in a clinic is assessing a 9-month-old infant. Which of the following findings requires further intervention?

A. The negative Doll's eye reflex is normal in infants after a few weeks of life as the reflex should disappear by 2-3 months. B. The Moro reflex typically disappears by 4-6 months of age. Persistence beyond this age may indicate neurological issues and requires further intervention. C. The Babinski reflex is normal in infants up to 2 years of age. D. The crawl reflex may not be consistently present at 9 months, but it is not as concerning as the persistence of the Moro reflex.