In the short story "The Open Window", the line that foreshadows the trick that the niece will play is option D, "Then you know practically nothing about my aunt?' pursued the self-possessed young lady". She want's to make sure Mr. Nuttel knows nothing about her aunt to trick him. Options 1 and 3 are parts of the story she invents and option 2 introduces this girl as a character. Once she is sure that Nuttel does not know her aunt she can begin with her mischief.
