Final answer:
The correct sentence uses a semicolon to separate the main clause and a comma in the correct place.
Step-by-step explanation:
The sentence that uses punctuation correctly is:
I just read an excellent article about climate change; however, the author defi
debate.
The correct use of punctuation in this sentence is the semicolon (;) used to separate the main clause and the conjunctive adverb 'however', and the comma (,) used after the introductory phrase.
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