You want to remain on the priority road. What must you anticipate now?

You answered correctly. When you want to stay on the priority road, you must be aware of possible dangers from other road users. First, the red car on the side street might not see you and could enter the intersection even though you have the right of way, so you should be ready to brake if necessary. Second, children might suddenly cross the street, especially in residential areas, and you always need to be alert and reduce your speed near them. Both of these are valid situations you should anticipate according to German traffic rules. The third answer, that the van ahead continues on the priority road, is not something you need to anticipate because you both have the same right of way—so it's not considered a risk. Always focus on the actions of other road users who might misunderstand the situation or behave unpredictably.