A nurse is assessing an 18-month-old toddler during a well-child visit. Which of the following findings should the nurse identify as a potential developmental delay?

A. This is typical behavior for an 18-month-old toddler. They often play alongside others without interacting directly. B. This is a normal developmental milestone for an 18-month-old child. C. An 18-month-old child should be able to walk independently. Difficulty walking with assistance could indicate a potential developmental delay. D. While vocabulary varies, most 18-month-olds can say a few words. This is within the normal range.