Which of the following statements is true regarding school bus operation?

Maintaining a clean driving record is vital for school bus drivers because it reflects their reliability and safety on the road. A clean driving record indicates that the driver has adhered to traffic laws and has not been involved in accidents or violations that could endanger the safety of the children they transport. This is essential as school bus drivers are responsible for the safety of their passengers, who are often young and vulnerable. A strong driving history helps ensure that the driver is trusted to operate the bus safely and responsibly.

In contrast, allowing driving under the influence of medication could compromise the driver's ability to operate the vehicle safely, while allowing unattended passengers poses severe safety risks for children. Lastly, while flexibility can be essential in certain situations, school bus routes are typically pre-determined for safety and efficiency, and altering them without proper authority could lead to confusion and danger.