The nurse is providing education to parents of a 7-year-old child who fractured an arm and is being discharged with a cast. Which instruction should be included in the teaching?

Rationale: A. Persistent or worsening swelling may indicate compromised circulation and should not be considered normal. B. Coolness and color change can signal impaired circulation, a sign of potential complications like compartment syndrome. C. Immobilizing the shoulder unnecessarily can lead to stiffness and decreased range of motion. D. Letting the limb hang can increase swelling and is not recommended. The limb should be elevated to reduce swelling.