A nurse in an emergency department is triaging clients following an external natural disaster. Which of the following clients should the nurse identify to receive care first?

A client who has an open fracture of the tibia and reports pain as 5 on a scale of 0 to 10

A client who has suspected appendicitis and reports severe lower right abdominal pain

A client who has a penetrating head wound and fixed pupils

A client who has flail chest and a respiratory rate of 32/min