Answer:
D. It suggests that the visit is just a brief sample of a pleasant life,
Explanation:
The above option is the correct answer.
From the excerpt, we are told that "...those great bites of time made all September a Queen's festival". This suggests that there is something pleasant in Aunt Imogen's visit since the sentence tells us that such September were a Queen's Festival. Using "bites of time" tells us that the visit is just a brief sample.
Bite has to do with little, small or brief. Option D is the correct answer.