What can be an effect of not keeping the bus clean?

Keeping a bus clean is crucial for several reasons, and understanding the implications of neglecting this responsibility highlights the importance of cleanliness for both safety and operational efficiency.

When a bus is not kept clean, it can lead to increased driver fatigue. A cluttered or dirty environment can be distracting and uncomfortable for the driver, making it harder to focus on the road. A clean bus helps maintain a professional atmosphere and can promote alertness.

Moreover, neglecting cleanliness can result in higher maintenance costs. Dirt, grime, and debris can lead to wear and tear on the bus's exterior and parts, requiring more frequent repairs and components replacement. Regular cleaning contributes to the longevity of the vehicle and can help prevent costly repairs down the line.

Decreased visibility for bus drivers is another critical factor. Dirt on windows or mirrors can obstruct a driver’s view, increasing the risk of accidents. Clear visibility is essential for safe driving, especially when it comes to ensuring the safety of students boarding and exiting the bus.

Combining all these considerations—driver fatigue, maintenance costs, and visibility—demonstrates that not keeping the bus clean can have a comprehensive negative impact, making the choice of 'all of the above' the most accurate answer.