It sounds to me like time so. The poet is discussing the inevitable speedy passage of time is the choice I would be pick.
I'm going to say B because there is various ways to determine the meaning of a word you do not know
<em>Shelley's novel, Frankenstein: or, the Modern Prometheus (1818), is a combination of Gothic horror story and science fiction. The book tells the story of Victor Frankenstein, a Swiss student of natural science who creates an artificial man from pieces of corpses and brings his creature to life.</em>
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B. Claim of Policy, this is the correct answer