Answer: Justifying an opinion- backs opinion by research
Explanation:
I believe that It is C, because although the passage does focus on Mathilde's love for expensive things, broadly the subject is how Mathilde is discontent with the lifestyle she is now living, and D is too broad, and B is also too broad.
The answer is C. The story never had anything about prison, and the story clearly states that the doctor was there. also the doctor didn't seem to bother the man he only passed by. SO C is your only logical answer