For what should your prepare yourself in this situation?

You answered correctly because both selected points are important precautions when approaching a stopped bus in Germany.

Firstly, as the bus starts moving off, it often swings out slightly from the curb before continuing along the road. This means you should anticipate a possible lateral movement of the bus towards your lane, so you must be prepared to adjust your speed or position to maintain safety.

Secondly, passengers commonly cross the road behind the bus after getting off. Since the bus obstructs your view of the rear area, you must slow down and watch carefully for pedestrians who might suddenly step into your path.

The third option about a quad suddenly moving is unrelated to this scenario and does not apply here.

In summary, German traffic rules require you to be especially cautious near stopped buses, anticipating both the vehicle’s movement and pedestrians crossing behind it to ensure safety for everyone.