How does the dialogue in paragraphs 78-94 develop the plot of the story?

A
It reveals that Mr. White’s wish has been granted but not in the way they expected.
B
It shows that the visitor is uncomfortable with what he has to say, even though he is bringing a gift.
C
It suggests that Mrs. White is concerned about her husband and takes steps to help him deal with the news he’s received.
D
It shows the sergeant-major reappearing in the story and causing more problems within the family.