A parent describes a 3-year-old child in constant motion and is unable to sit still during story time. The parent is concerned about this behavior. Which nursing response indicates an appropriate evaluation of the situation?

A. "This child has symptoms of the early stages of autistic disorder.": Autism spectrum disorder typically presents with deficits in social communication, repetitive behaviors, and restricted interests rather than hyperactivity alone. Constant motion by itself does not indicate autism. B. "This child's behavior indicates possible symptoms of oppositional defiant disorder.": Oppositional defiant disorder involves persistent patterns of defiant, disobedient, and hostile behavior toward authority figures. Hyperactivity or inability to sit still is not a defining feature. C. "This child has symptoms of attention deficit hyperactivity disorder.": While hyperactivity is a hallmark of ADHD, a diagnosis cannot be made based on a single observation or parental report. Comprehensive evaluation over time and across settings is required. D. "This child's behavior must be evaluated according to developmental norms.": Children’s activity levels vary with age and developmental stage. Comparing behavior to developmental expectations allows identification of typical versus concerning patterns and determines if further assessment is warranted.