A nurse is caring for an older adult client who states,"I am afraid that I may fall while walking to the bathroom during the night. Which of the following actions should the nurse take?

The correct answer is D: Leave a nightlight on in the client's room. This is the best option as it addresses the client's fear of falling during the night by providing adequate lighting for safe movement. A bedside commode (A) may be helpful but does not directly address the client's fear of falling. Limiting fluid intake (B) may lead to dehydration and is not the best approach. Putting up side rails (C) restricts the client's independence and may not prevent falls. Leaving a nightlight on (D) promotes safety and independence.