Some of the main themes of Wuthering Heights include love, both brotherly and romantic, as seen in the relationship between Heathcliff and Catherine. Another main theme would be revenge as an act of hate, a contrast to the theme of love earlier in the book. Hope this helps!
I believe the best answer choice is D.Revenge because after not being able to be with the woman he loves his sole focus is revenge. It becomes his drive and his passion.
