A nurse is caring for a client who is immobile. Which of the following interventions is appropriate to prevent contracture?

The correct answer is D: Apply an orthotic to the client's foot. This intervention helps to maintain proper alignment of the foot, preventing contractures that can occur due to prolonged immobility. Placing a pillow under the client's knees (choice A) is beneficial for reducing pressure on the lower back but does not specifically address foot contractures. Similarly, placing a towel roll under the client's neck (choice B) is helpful for neck support but does not prevent foot contractures. Aligning a trochanter wedge between the client's legs (choice C) is aimed at hip alignment and not foot contractures. Therefore, the most appropriate intervention to prevent foot contractures in an immobile client is applying an orthotic to the client's foot.