For question 16, why is it not D?
In lines 33-37 it seems to be saying that her preference anticipated an important formulation of the criticism of fiction: "narratology". Then goes on to talk about that. I'm confused!!!
Maybe the clearest way to express it is to say that this is not a passage about the development of narratology in the 1960s.
Perhaps the easiest way to demonstrate that is to ask you what this passage is about. I'd give you [Dr. Evil voice] one. millllllion. dollars. if your answer was anything other than "This passage is about how Willa Cather is _______." And however you choose to fill in that blank (and you'd most likely fill it with "...a narrative writer more than a novelist."), you're nevertheless clear that it's about Willa Cather, not about Narratology In the 1960s.
This is a common phenomenon, by the way. I don't dispute that (D) is true. It's just not the main point.