Read this conclusion.

i am grateful that so many people came to support the library. i assert again that the library should not be demolished. there are several reasons to maintain this building in its current location. let your voice be heard in tomorrow’s county meeting. cast your vote in favor of this prized institution.

to best strengthen this conclusion, the writer should

restate the claim.
share a humorous story.
summarize key points.
close with a call to actio

C) summarize key points.

Explanation: A conclusion is the last part of something, its end or result. In a written work, the conclusion is used to introduce some final comments at the end of the piece of writing. To strengthen the given conclusion, the writer should summarize the key points, his claim is that the library should not be demolished, but he should briefly write the reasons why it shouldn't, in this way, the conclusion would be more convincing.

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explanation: