The victim of a curse, became a lycanthrope so he was locked away in his cellar laboratory so he wouldn't hurt anyone.
A. Character versus nature
i think its "Its irony helps the reader understand that such an idea is not acceptable and isn't meant to be taken seriously."
The following sentence best paraphrases the passage:
"Swift maintains that, if asked, people who have lived in poverty their entire lives would say that they would rather have been sold for food at one year of age."