The answer is the first one.
In "Writers often disavow the notion of a 'literary duty'" the author conveys a somewhat condescending attitude, as if they would always follow this and set aside anyone who said otherwise. This attitude says the author is looking down on them, and that the author believes that many authors do not meet their standards.
Another answer I would consider is "...writers ruined by their shrill commitments." However, there is no context or clear tone. The author could be mournful of the lost potential for all we know.
She returned to her 12th birthday bcuz she thinks it was unimportant. While she was reliving this she realized that all humans are blind. She realized that she took life for granted and did not appreciate the little things. She did not appreciate what she had until she had lost it. In the beginning the other dead people had warned her not to return to the land of the living but she still did it. When she returned she told them "I should have listened to you. That's all human beings are. Just blind people. Thornton wilder is trying to get the readers to appreciate the small things because later on they become things you regret that you did not appreciate.
hope this helps :)
To kill a mockingbird means to destroy innocence. Tom Roninson, and Boo Radley can be identified as
mockingbirds — they are innocents whove been injured or destroyed by evil
I think it's a preposition.