When coding, the primary reason for the office visit is listed first, and other reasons are listed in what order?

Normal fasting blood sugar readings are between:

a. 40–50 mg/dL b. 50–80 mg/dL c. 80–100 mg/dL d. 100–120 mg/dL

A gymnast hit her head on the balance beam during practice. Upon examination she seemed oriented, but then she began saying she was dizzy and nauseous. She cannot recall precisely what happened to her. The trainer calls EMS to get her to the hospital. Is he overreacting?