A is closest contender and rest are not even remotely connected to correct answer. Answer A supports a conclusion, but it is not the conclusion of argument rather it is conclusion of many news papers. conclusion of argument is opposite to the conclusion of news papers, as evidenced by the keyword "However" in the last sentence. So correct answer must be something like:
The first provides evidence supporting a conclusion; the second gives a reason for questioning that conclusion.
In
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The first provides evidence supporting a conclusion; the second gives a reason for questioning that conclusion.
In
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