The part of this excerpt that is directed against a particular social class in Ireland is "..I grant this food will be somewhat dear, and therefore very proper for landlords, who, as they have already devoured most of the parents, seem to have the best title to the children..."
In this part Jonathan Swift criticizes powerful and rich people, mocking landlords for being a part of a high social class.
Answer:
The answer to your question is a.
If you are trying to remember information that you are reading, you should be an "active" reader, who pays attention to the words and thinks about connections that may occur.
a literary technique, originally used in Greek tragedy, by which the full significance of a character's words or actions is clear to the audience or reader although unknown to the character.