How should drivers approach a situation where they see a pedestrian with a mobility aid?

Using caution and preparing to stop when encountering a pedestrian with a mobility aid is crucial for ensuring their safety. Pedestrians with mobility aids, such as canes or wheelchairs, may have reduced mobility and may need extra time to navigate their surroundings. By proceeding with caution, drivers are showing consideration for the pedestrian's right of way and their potential vulnerabilities. This approach creates a safer environment for all road users and helps prevent accidents.

The other choices involve actions that could endanger the pedestrian. Speeding up and passing quickly disregards the pedestrian's presence and could lead to a collision. Keeping a steady pace may not be sufficient as it doesn't account for the need to respond if the pedestrian needs more space or time. Finally, using the horn can startle the pedestrian, potentially causing anxiety and leading to unpredictable reactions. Therefore, the cautious approach is the most responsible and safest response in this situation.