What must you reckon with at a bus stop when driving a school bus?

The selected combination is correct because, while driving a school bus, you must be aware that children may act unpredictably. They often try to board as the doors are closing, which poses a safety hazard. Additionally, children might attempt to push into a fully loaded bus, as they may not understand the risks involved.

German traffic regulations emphasize the importance of caution around school buses to protect children, who are more vulnerable and less predictable than adults. Ensuring that drivers are vigilant about these behaviors helps prevent accidents and enhances the safety of young passengers. It's crucial to always stop at bus stops and remain attentive, as these scenarios are common where children are present.