The sentence that should be revised to reduce wordiness is the speech that the computer science expert gave about online data mining was informative and entertaining.
What is wordiness?
Wordiness means that there are more words in the text that are not necessary in the text. Wordiness makes the text boring and hard and long to read. The text should be prices so that readers would get the perfect story to read.
Thus, the correct option is D. The full question is attached below.
Learn more about wordiness
https://brainly.com/question/6614987
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