What is the relationship between Mr. Benedict and Mr. Curtain?

The correct answer indicates that Mr. Benedict and Mr. Curtain are brothers, which is a significant aspect of the narrative in "The Mysterious Benedict Society." This relationship adds depth to the story, as it sets up a contrast between their characters and values. Mr. Benedict embodies kindness, intelligence, and a sense of morality, while Mr. Curtain represents a more sinister, manipulative force with his own agenda. Their brotherhood not only creates a personal conflict but also highlights the themes of good versus evil in the story. This familial connection provides the emotional stakes for the characters and further develops the plot as the society works to thwart Mr. Curtain's plans.