A mother is telling the school nurse about her concerns regarding her 13-year-old daughter, who reports headaches. The child's grades have dropped, and the child is sleeping late and going to bed early every night. Which would the nurse identify as the priority?

A. A history and physical examination is crucial to identify any underlying health issues. B. A psychologist may help if mental health concerns are identified but is not the first priority. C. Psychometric testing may be necessary later but is not an immediate priority. D. Talking to the teacher may provide context but does not address the primary health concern.