A
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The answer to this question is:
Sentence 3
Stating that "they want people to slow way on down" does not have a clear message. Certain words need to be added and removed to make this understandable. Therefore, sentence 3 messes with the tone of the paragraph.
Hope this helps!
Apparently it's from the 15th Century's Old French emploier, Latin implicāre to entangle, to engage, from plicāre to fold
