A hyphen.
Hope this helped!
Answer:
C.
She feels guilty for insulting Lomov.
Explanation: because at the end she says " Bring him back! Back! Ah! Bring him here."
The foot-in-the-door method is basically a psychological method where you ask for a small request first, then a bigger one later. So I think it's A, just because the others don't work. B is just straight up asking for a big favor, C is providing you with the "must-do" effect, and D is simply a favor for a favor.
Characterization is when the author reveals the personality of the characters; Direct characterization is when the author flat out TELLS the audience what the personality of the characters are.
What culture was it talking about? We would need some more information to be able to help you with this question.
thanks! :)