The answer is: [D]:
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They are often used to combine choppy sentences.
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Conjunctions are often used to combine choppy sentences.
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Note: The questions asks about CONJUNCTIONS —NOT about "contractions".
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Choice "A" is incorrect. They are not used to combine two or more LONG sentences. If sentences are already long, then do not need to be combined with a conjunction.
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Choice: "B" is incorrect. To the contrary, the use of conjunctions actually makes sentences longer.
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Choice "C" is incorrect. To the contrary, the use of conjunctions should be used (appropriately, of course) in essays. The use of "contractions" should not be used in essays or formal writing.
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Choice "D" is correct. They are often used to combine choppy sentences for better reading and engagement.
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Answer: A. I prefer music with an easy beat, like reggae. This club music is too loud and fast for my taste
Proctor believes Parris is only in it for profits and he believes he that he is not worth his time listening to Reverend Parris Preaching.
How am I supposed to know if I haven’t read the paragraph.