The answer that you're possibly looking for would most likely be: "They will resume their marriage, and they will happily rule together over their kingdom" (option D)
To show the audience that he believed that Boniface deserved to be in Hell as well" In Canto XIX of the Inferno, Pope Nicholas III mistakes Dante for Pope Boniface VIII. Most likely the author's purpose in this scene is to show the audience that he believed that Boniface deserved to be in Hell as well
