remorseful is your best answer
"remorseful" means "filled with remorse, sorry". Even though it is not said, it is implied that he is sorry, because he thinks back to the history of how his mom ended up like that.
hope this helps
Its D. Shes too young and not ready for another 2 years
One pun is where Fortunato reveals that he is a member of the Freemasons and Montresor says that he too is a "mason." It is a pun because he does not mean a "Freemason"; he means a mason, a craftsman who does brickwork, the kind Montresor plans to perform on Fortunato to seal him in the catacombs forever.
