A antonym for anger is please "pleased"
Well,if you don't follow instructions you might make a mistake and mess up what you were supposed to do.Its making a cake,if you don't follow the instructions you could make the cake wrong and it would either not taste as good or it wouldn't come out like it should've.
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.
Dramatic irony is the answer bro
