I honestly think (A) makes most sense, though it would be better if you showed the paragraphs to make more sense of this question. I can only guess because there is no story, so I think its (A)! It relates to the title, "Aiden Goes Silent". So (A)...
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Cells yes. for the most part molecules = no and atoms, definately not.
They should both restate the claim. Your conclusion could have a Call To Action which tells the reader that you are giving a reference to him/her.
Answer:
the answer is C: Jonathan played a piano con...
