Answer: directly after the reason and as support for the rebuttal
Explanation: You need to back up your reasons with the evidence to support your claim, and you need to back up your rebuttal as well with evidence.
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.
That everyone writes differently and there is no one right way<span>
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What passage is this? This seems interesting!