A nurse is assessing a child and notes several bruises. Which of the following actions should the nurse take first?

A. Obtaining a detailed history is necessary to understand the context of the bruises and gather information about potential injuries, which can guide further action. B. Consulting a psychiatrist might be useful later but is not the immediate step. C. Reporting to authorities may be necessary, but the nurse should first gather information to have a clearer understanding of the situation. D. Separating the child from the parents is not an initial action unless there is immediate danger.