Read the following excerpt from the text, when pip returns from london to visit miss havisham. i had stopped to look at the house as i passed; and its seared red brick walls, blocked windows, and strong green ivy clasping even the stacks of chimneys with its twigs and tendons, as if with sinewy old arms, had made up a rich attractive mystery, of which i was the hero. estella was the inspiration of it, and the heart of it, of course. what is the "it" to which the last sentence refers? a. the hero b. the house c. the blocked windows d. the rich attractive mystery\