You don't have the options, but i would say it means that books can take us to another place mentally and take us away from our problems. Hope it helps !:)
Answer: I think that the moral of the story is that we can find happiness <u>even</u> in the darkest of times. This is because there was still hope even in all of that Hate, Envy, Suffering, Sickness etc.
C is correct in this situation.
