A nurse is assessing a 15-month-old toddler. Which of the following findings should the nurse expect?

A. Able to unzip a zipper. This fine motor skill typically develops closer to age 2 to 3 years. At 15 months, most toddlers do not yet have the dexterity required to manipulate clothing fasteners. B. Builds a tower of 4 cubes. A 15-month-old can usually build a tower of 2 to 3 cubes, while building a tower of 4 or more cubes is more typical around 18 to 24 months. C. Throws a ball without falling. While some toddlers may attempt to throw a ball, doing so without falling is more characteristic of children around 18 months or older as balance improves. D. Walks without help. This is an expected milestone by 12 to 15 months. Most toddlers at 15 months are able to walk independently, though gait may still be wide-based and unsteady.