The answer is (d), because it is further explaining what the thieves do.
What is the genre? that's what you first need to ask.
Answer:
Explanation:Gatsby has fired all of his servants and replaced them with associates of Wolfshiem. Gatsby was concerned that the old servants were gossiping in town about Daisy's visits to his mansion. Gatsby calls Nick to invite him to Daisy's house for lunch.
I think it might be the word " soul mate " ?