A nurse is assessing a 10-month-old infant. Which of the following findings should the nurse report to the provider?

A. By 10 months, an infant should be able to sit steadily without support. This milestone is essential for proper development, and the inability to do so may indicate developmental delays or underlying neurological issues. B. Building a tower of three or four cubes is a skill typically expected at 18 months, so it is not a concern for a 10-month-old infant. C. Turning pages in a book is a fine motor skill usually developed around 12-18 months, so it is not expected for a 10-month-old infant. D. Imitating animal sounds is a language skill that develops around 12-18 months, so it is not expected for a 10-month-old infant.