Bunuel
Two investigative journalists have raised the question whether the new blood pressure drug, Transerythropaxil, has sensitized patients to develop fish allergies. The study was published last month in a major newspaper, and has been picked up by media throughout the country.
Lab data has long shown that Transerythropaxil reacts strongly with Eicosapentaenoic acid, found in abundance in fish oil, and this reaction can produce biological irritants. Despite strenuous objections from Transerythropaxil's manufacturer, scientists working in federal labs have just published papers that provide conclusive evidence to the journalists' claim.
In the argument given, the two portions in boldface play which of the following roles?
(A) The first states the conclusion of the argument; the second calls that conclusion into question.
(B) The first provides support for conclusion of the argument; the second calls that conclusion into question.
(C) The first provides support for conclusion of the argument; the second identifies the content of that conclusion
(D) The first identifies the content of the conclusion of the argument; the second provides support for that conclusion.
(E) Each provides support for the conclusion of the argument
Official Explanation
The credited answer is (D). The first bold statement is stated tentatively, as a question, but it is ultimately validated, and so it is the conclusion of the argument. In the second bold statement, "lab data" has to be evidence, and this evidence provides strong support for what the journalists suggest: in other words, it is evidence that supports the conclusion.
It is true that the first bold statement is the conclusion, but the second bold statement does not call it into question: by contrast, it completely supports the conclusion. Choice (A) is incorrect.
If the first bold statement is not the conclusion, it's unclear what else would be; furthermore, even if we are going to say something else is the conclusion beside the first bold statement, the two bold statements still support the same perspective, one can't be supporting something that the other calls into question. Choice (B) is incorrect.
The second bold statement is "lab data". Lab data is evidence, and can be neither a conclusion nor the content of a conclusion. We use this phrasing, "content of a conclusion", most often when the conclusion is not explicitly stated (e.g. "P says: XYZ. Then, Q disagrees with P" and Q's position, not explicitly stated, is the argument's conclusion). Choice (C) is incorrect.
Choice (E) is tempting, but nothing else in the paragraph besides the first bold statement could serve as the conclusion. Both the second bold sentence and the second half of the concluding sentence are just statements of scientific data, which are evidence, not conclusions. Choice (E) is incorrect.