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masoomdon
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My choice is D. This is a question about sample. In such question we have to prove that sampling procedure is accurate. D does just that. What is the OA?
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I think the answer is B because we are using other evidence from to support similar results that come from eating meat diets.

Whereas, answer D uses the same sample which is under question and cannot be used as comparison.
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I had narrowed it down to B and D and had picked B as my answer
OE:For this argument , the best way to strengthen the argument is to obtain identical results for several additional Native American women. Choice D is correct
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Yes D should be the answer.

I chose B. it is wrong, as the argument clearly mentions " further the only dietary source of these vitamins is red meat. ". So we shouldn't be looking for option which strengthens the argument - sources of these vitamin D and K is meat based diet. Rather we must strengthen the conclusion by looking for options which compares the result with other samples exactly what D does.
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Answer B. For example only those women who ate read meat exceptionally in a large group of women who was taken sample. But D make sure that in large group the experiment result is identical. So D should be the answer

from- nkmungila
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conclusion=Therefore, it is likely that Native American women from the 1800s consumed a meat-based diet, rather than vegetarian fare.
one of the premises talk about dietary source of vitamin D and K, but it does not tell us about Non dietary source.
B is not right because the level of vitamin D and K in the hair sample of European can be equal to Level of Vitamin D and K in the hair sample of American women, even though American women do not meat and one of the reason can be non dietary supplements.
Vitamin D source= Sun (a well known fact, even though not needed for answering the question)
Vitamin K source= Bacteria in the gastrointestinal tract( also not needed, but did some research out of curiosity)


Answer is D because it give us other evidence, which supports the conclusion.
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D) removes a possible weakener- maybe the few women who were used as samples did not adhere to the norms and did consume meat or just had to under certain circumstances. CORRECT

B) tricky option nothing too wrong in this one except that a better option D) is available- reasoning can be maybe time period has not been specified for the sample of women from europe - maybe they took supplements.
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