Final answer:
The narrator's questionable sighting of a woman and her decision to accept a doubtful explanation without further inquiry support the idea of her being unreliable. The correct answer is option 1. and 2.
Step-by-step explanation:
The excerpt from "The Lady Maid's Bell" suggests an unreliable narrator because the narrator admits to seeing a woman whom none of the other characters have seen, raising questions about her credibility. She also concocts a reason for why the woman might have been in the house without fully believing it herself, choosing to stop asking questions rather than investigating further. Additionally, the narrator seems to accept the woman's presence as part of the servants' secrets, which implies a form of denial or avoidance in confronting the truth.