A nurse in an urgent care clinic is collecting data from a group of clients. Which of the following findings should alert the nurse to the possibility of child maltreatment?

A 6-year-old child who is toilet trained and bedwetting

An 8-month-old infant who has stranger anxiety

An 18-month-old child who has several bruises on their shins

A 2-year-old child who kicks and screams when their parent leaves