A community health nurse is performing a home visit for a client and is evaluating the home environment for safety. Which of the following findings would indicate to the nurse that the client has a proper understanding of safety in the home?

A. A single light fixture along the sidewalk may not provide adequate lighting, increasing the risk of falls, and does not reflect proper home safety. B. A small area rug at the front door can create a tripping hazard, indicating a need for improved safety measures. C. Changing the batteries in the smoke alarms annually demonstrates that the client is maintaining functional smoke detectors, which is a key aspect of home safety. Regular maintenance of smoke alarms helps prevent fire-related injuries. D. While a water heater set at 54° C (129.2° F) can prevent scalding, current safety recommendations suggest a slightly lower setting (around 49° C / 120° F) to maximize safety, so this is not the best indicator of proper understanding.