The irony is both of them sold their most prized possessions to get the other a special christmas present, however both of their presents are designed for the prized possession each one sold.
This is critic as both characters realised that the other person would give up their prized possession for them to be happy. This is a key message sent by the author through this book. They are wise as they know that people should be more valued over possessions.
B and C
Both of them correctly state the author and paragraph number the sentence can be found on.
By golden mean Aristote mean choosing the balance between excess and deficit of behavior. In todays time an example of a virtue is courage which is between rash behaviors and cowardice.
Hope this helps !
Photon