I believe it would be the second option
The answer is B. it's just a way to strengthen your argument by debunking the other side respectively.
I'm wondering if the sentence has a typo or it is really written as: The most amazing vacations are <u>to</u> places with...
Most sentences don't have that "to" in that part of the sentence or have it at all.
If that is the problem, then it looks like your question can be answered!
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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The second one I’m pretty sure !