Answer:
D. Thoreau regrets conforming to the expectations of others.
Explanation:
The figure of speech he is using is irony - he says that he <em>behaved so well </em>even though he considers that behavior to be bad. His neighbors, or rather the people around him, behave a certain way that Thoreau doesn't really approve of. However, in order to conform, or fit in with the rest of the society, he behaved in the same way they did, which made him disgusted and want to repent after having betrayed his ideals.
Really it depends upon what the author makes it. If it's a published book, it's a for entertaining purposes. If it was informal, it's be a biography.
#1 is either D or A bit I’m pretty sure D (sorry I know that’s not super helpful)
#2 is C and #3 Is B
The answer is C. The story never had anything about prison, and the story clearly states that the doctor was there. also the doctor didn't seem to bother the man he only passed by. SO C is your only logical answer