In "The Open Window," Mr. Nuttel's expectations about the interaction he is about to have are influenced primarily by his concerns regarding the visit among strangers. The correct response would be:
He does not expect the visit among strangers to have much value.
This expectation stems from his anxiety about interacting with new people and his belief that such formal visits may not contribute positively to his nerve cure, as indicated by his reflections on his sister's warning and the overall context of his visit.