That said the book implies that Gatsby made his fortune in an unsavory way. ... The most prevelant rumor is that Gatsby got his money through bootlegging (illegal sale of alcohol), which he did through his ties to the mob.
I think the answer would be A since it shows that Mrs. Linde was in love with Krogstad, but I’m no professional though.
If you’re stuck somewhere, a radio can help contact other ppl to send help