If you are looking for the def. of the word enlightened— it would be D - Knowledgeable. Enlightened means having knowledge.
D. to relate a noun or pronoun to another part of the sentence. Example: A girl from home. The preposition 'from' shows the relationship between the girl and home.
So I normally use the word Climax but I'm assuming that climax and main action are the same thing. The main action is definitely (B) - Mary's husband tells her that he is leaving her, because that is what starts the suspense.
Please tell me if that isn't right, I think it is.
if someone leaves their house in the pursuit of success they are willing to go outside of there comfort zone and take on new challenges.