How does this dialogue advance the action of the story?
O by showing that the Bauers won land in the race
O by revealing that Johann's father has been injured
O by revealing who will represent the Bauers in the land
race
O by showing that Johann is too young to participate in the
race

The dialogue advance the action of the story by by revealing that Johann's will represent the Bauers in the land race

Explanation:

The dialogue reveals the Han's viewpoint who  believes that Johann will be the best person to participate in the race  that is being conducted the very next day.Although he feels that  Johann is still a boy, but he is also the best person  for the job.

The story revolves around a family of peasants the German word "Bauer" is used to represent the family.The narrator wants that his family should no  be known as the Peasant family and so he decides to participate in the land race(so that they can become the land owner after winning the race) race ,but due to the injury he is not able to participate in the race.So he decides that his son  johann, though still a boy, is the best man for the job.(i.e for participating in the land race)

Hence ,we can say that the dialogue advance the action of the story (C) by revealing who will represent the Bauers in the land  race

in my opinion, ap calculus was the most difficult. i often struggled with it a lot. however, i have gotten a lot better.