The answer is D because each story involves the topic of knowledge and good doesn't overcome wickedness in each story. Choices A and C doesn't even relate to any story listed. Therefore, D is the best answer.
Helplessness. is the answer
I believe that the correct answer is C because that literally shows it, but it also could be A because that is a more accurate detail that she actually missed it, and that it wasn't just a random bus. But, I think it is most likely A because C is just imagery. Hope this clarified it a little bit!