A nurse on an orthopedic floor is completing the morning assessments on several clients. Which of the following clients has the greatest risk for fat embolism syndrome (FES)

A24-year-old male who has a casted femur fracture

A 10-year old female who has an ulnar fracture in an external fixator

A 45-year-old male who has multiple rib fractures

A 62-year-old female who has vertebral fractures due to osteoporosis