'Finally' is the answer the others don't make sense if you try to read them with the rest of the sentence.
I would say:
<span>C. love endures despite family hardship
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This is evident because the family is going through a very hard time, but Frankenstein doesn't understand why they are so sad when they have a home and family. He sees his reflection and sees how ugly he is, but he still can't help being good.
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"like an arrow presently to his home in the green world beneath"
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.
