What is a common distraction for school bus drivers?

All of the mentioned options can serve as potential distractions for a school bus driver, making the choice of encompassing all of them the correct answer.

Conversations with students can pull a driver's attention away from the road, especially if there are multiple students talking at once or if discussions become animated. This distraction can be particularly concerning because school bus drivers have the responsibility of monitoring the behavior of students behind them while also ensuring safe driving practices.

GPS devices, while useful for navigation, can also distract drivers if they need to take their attention off the road to input information or look at the screen. It's essential for drivers to know their routes well enough to minimize reliance on such devices.

Radio usage is another significant distraction; adjusting controls or being engaged with any broadcasting can divert attention from driving. School bus drivers have to maintain high levels of focus, and any distraction, including music or conversations, can jeopardize safety.

Hence, recognizing all these factors collectively as distractions highlights the multitude of potential challenges drivers face in maintaining focus on the road while ensuring student safety.