A nurse is caring for a client who is experiencing pain related to osteoarthritis in the right hip. Which of the following non-pharmacological interventions should the nurse provide to relieve the client's pain?

A. Teach the client to use compression stockings: Compression stockings are primarily used to prevent venous thromboembolism and edema, not to relieve osteoarthritis pain. They do not address joint stiffness or muscle discomfort associated with osteoarthritis. B. Place a moist heating pad over the affected area: Heat therapy helps relax muscles, increase blood flow, and reduce joint stiffness, providing effective non-pharmacological pain relief for osteoarthritis. Moist heat is often preferred because it penetrates deeper into the tissues compared to dry heat. C. Avoid platelet-rich plasma therapy: Platelet-rich plasma therapy is an invasive treatment option and is not considered a routine non-pharmacological intervention for osteoarthritis pain. Avoidance of this therapy is not a direct pain-relief strategy. D. Encourage the client to use crutches to ambulate: Crutches are generally not indicated for osteoarthritis pain unless severe weight-bearing restrictions are needed. They do not actively relieve joint pain and may increase fatigue or strain in other areas.