Irony plays a significant role in a literary work by creating a disconnect between what is expected and what actually occurs. This can engage the reader more deeply, as they recognize the contradictions and complexities of the characters' situations, thus prompting reflection on the deeper meanings of the narrative. Irony can highlight the differences between reality and appearance, challenge assumptions, and encourage critical thinking about themes and social commentary within the story. Therefore, the most fitting response is:
It creates a disconnect in the reader between what is happening in the story and what occurs in daily life.