The sentence that best describes the tune is that the author relied mainly on quotes rather than statistics.
The tune is very important part for the author to express his feelings and view points in front of the public. It is assumed that without the tune, the author is useless and cannot express his feelings in front of the public.
The author is generally used in the formal tune in conveying the message in front of the public. The author relies primarily on quotes rather than statistics, according to the sentence that best represents the melody.
Therefore, option B is correct.
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