An x-ray for a child's fractured ulna also shows multiple old injuries. Child maltreatment is suspected and the parents are interviewed. Which parental response supports this suspicion?

Rationale: A. Displaying guilt may indicate remorse but does not confirm maltreatment. B. Inquiring about discharge expectations is typical parental behavior and not suspicious. C. Offering inconsistent or conflicting stories about how injuries occurred is a common red flag for child abuse or maltreatment. D. Expressing concern for the child is expected and does not indicate maltreatment.