It can be inferred that the key difference between Wheatley’s "on virtue" and frost’s poem "mending wall" is ""on virtue" uses metaphor, while "mending wall" does not." (Option C)
An inference refer to the thoughts of the subject who has gone through the a text and examined it's details logically.
Hence, It can be inferred that the key difference between Wheatley’s "on virtue" and frost’s poem "mending wall" is ""on virtue" uses metaphor, while "mending wall" does not."
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