Which finding will cause the nurse to refer a 12-month-old child for further neuromuscular testing?

A. Feeding with a sippy cup is appropriate for a 12-month-old child. B. Taking steps is developmentally typical for this age. C. A 12-month-old should be able to sit independently. Needing support for sitting may indicate a delay in neuromuscular development. D. Using a pincer grasp is expected at this age and reflects normal fine motor development.