Tone is created through word choice, sentence construction/ word order, and by what the viewpoint is focusing on.
Answer:
1. Alleviate - to relive; to make disappear.
2. Anticipate - to predict or tell about in advance.
3. Counterargument - an argument that opposes another argument.
Explanation:
C+D because it makes the most sense.
It seems to me that, the thing wthat <span>the author has done in order to create a tone of seriousness in this piece is </span>a fact that he has used a long sentence with complex syntax to ask the reader to pay close attention.
Even though you haven't shared any options to choose the correct one, I bet this one will suit the question.
Regards.
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