Answer :
The sentence "Argumentation is an advanced skill that ought to be taught only to those who are serious about their studies." would best orient the audience and provide an engaging introduction to the topic of the paragraph.
The topic sentence should identify the main idea and point of the paragraph. The sentence above set the scope of the main idea "argumentation", which will orient the audience. And then "Advanced skill that ought to be taught only to those who are serious about their studies." will be an eye-catching and enganging introduction. Therefore, these make the sentense the most enganging topic sentence that led the audiece to focus about the topic "Argumentation".
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