Answer:
D. Information about the character's social status.
Step-by-step explanation:
Social status are really significant in novels because habilitates reader to imagine the character profile. In novels, all depends on those signals that readers receive in order to connect with story. That's why a character description is so important. So, the answer should be the last one.
Also, other options don't have much sense, for example, previous works don't implicate that your are going to know about an specific character in another novel. Simply because if the novel has a different plot, scene and context, they will not match.