The three groups that are in the story are the city group, the feudal group, and the pilgrims. Chaucer falls under the feudal group because he spent a lot of his time being a negotiator and diplomat for the government. He has some feudal responsibility since he is supported by the government.
Answer:
Gatsby asked Nick if he could invite Daisy to his house one afternoon and invite himself (Gatsby) as well.
All of these could be considered an "author's purpose". An author is technically anyone who writes anything, therefore the purpose of writing is theoretically limitless. If you have to choose one of these, however, it would be "to remind".
I think option (A)/is right ...