What is a potential challenge for school bus drivers regarding laws?

Keeping up with frequent changes in laws and regulations is a significant challenge for school bus drivers. This is crucial because traffic laws, safety regulations, and school bus operation guidelines can be updated regularly to improve safety and efficiency. Drivers must stay informed about these changes to ensure they are operating within the legal framework, thus ensuring the safety of their passengers—the students. Frequent updates can involve new traffic safety laws, modifications to bus operation protocols, or even changes in school district policies. Failing to stay updated could lead to violations that jeopardize both safety and the driver's licensing status.

The other options, while they may present challenges in their own way, do not address the ongoing nature of legal changes that drivers must actively monitor and adapt to in their professional duties.