It is about Gordon korman using the item as the next future item in the case of the continuing investigation. The protagonist says the character of the secretary is the only territory of the England in the northwest. Therefore the protagonist is saying that Gordon is using the future time telling as the next best item. Good luck :)
Answer: B, (ghost)
Explanation: Unsure of how 'apparition' was used in Line #3 of Alexander Pushkin's poem but I'm fairly sure that B (ghost) is your best bet due to the fact that the dictionary definition for apparition is a ghost or ghost-like image of a person.