The subject of this excerpt is money: as Mathilde's longing or motivation, a limitations that conditions her because of her gender, also her reason for dissatisfaction, and that which determines her social status. All these topics are linked by the common theme/subject "money".
The answer would most likely be C. Fine, do whatever you want. This would be so because an interjection is when you remark something like, "oh dear me!" Hope this helped!
