Which of the following could be considered a distraction while driving?

Tuning the radio is indeed considered a distraction while driving. This activity requires the driver's attention to locate the correct station or adjust the volume, which can divert focus from the road. The act of changing settings or searching for a specific channel can take the driver's hands off the wheel and their eyes off the road, increasing the risk of an accident.

In contrast, adjusting the mirrors is a task that is typically done before driving and, if necessary, can be completed quickly and safely while paying attention to the surroundings. Watching the road signs is essential for safe driving, as it provides crucial information about the road conditions and traffic rules. Looking for an exit is also a necessary part of driving that, when done appropriately, should not detract from road awareness, especially if it is planned in advance and the driver remains cautious.