The correct option is D All of the above.
Slings, casts and braces support and protect broken bones, dislocated joints, and injured soft tissues such as tendons and ligaments. Immobilization restricts motion to allow the injured area to heal. It can help reduce pain, swelling and muscle spasms. In some cases, splints and casts are applied after surgical procedures that repair bones, tendons or ligaments. This allows for protection and proper alignment, early in the healing process. A crutch is a mobility aid that transfers weight from the legs to the upper body. It is often used for people who cannot use their legs to support their weight for reasons ranging from short-term injuries to lifelong disabilities.