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

A. The toddler cannot turn a doorknob: Turning a doorknob requires fine motor coordination typically seen closer to 2 years of age. It is developmentally appropriate for a 15-month-old to not yet have this skill, so this finding is not concerning. B. The toddler cannot jump with both feet: Jumping with both feet generally develops between ages 2 to 3. It is not expected for a 15-month-old to perform this gross motor skill, so its absence at this age is normal and not a cause for concern. C. The toddler cannot build a tower of six to seven cubes: At 15 months, toddlers may only be able to stack two to three blocks. Building a tower of six to seven cubes is a skill typically achieved around 24 months. The inability to do this at 15 months is developmentally appropriate. D. The toddler cannot stand upright without support: Most toddlers achieve independent standing by 12 to 15 months. A 15-month-old who cannot stand upright without support may have a gross motor delay or neuromuscular issue, making this a significant finding that warrants provider evaluation.