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TheGraceful
14 Dec 2020, 19:09
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gvij2017
I echo the same and preferred C over A.
GMATNinja, GMATninja2, @veritasprepkarishma,
please help.
19 Dec 2020, 11:44
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TheGraceful
First, let’s consider the physician’s argument:
- The physician concludes that “some older people can lower their blood pressure by drinking milk.”
- He/she supports this by stating that one glass of milk has enough calcium to make up for any underlying calcium deficiency.
- And the rise in blood pressure associated with aging is often the result of calcium deficiency.
- The physician also includes one other note that calcium deficiency is frequently the result of not enough active vitamin D to absorb calcium.
But the physician’s argument seems to be missing something. Milk may have enough calcium, but the calcium deficiency is not necessarily the result of not enough calcium. The problem is that old people don’t have enough active vitamin D to absorb calcium. So, how do we know that the old people will be able to absorb the calcium in milk?
The question stem is also unique here, and it’s an excellent example of why we always advise against lumping questions into different question types. It would be easy to call this an assumption question, and we would then look for an answer choice that must be true in order for the conclusion to be properly drawn. But that’s not what the question asks for. Instead, it asks that we find an answer choice that, if assumed, makes the physician’s conclusion properly drawn. So, we’re looking for an answer choice that fills the gap in the physicians’s reasoning identified above, and thus ensures the physician’s reasoning makes sense.
With that in mind, let’s take a look at (C):
Quote:
So, drinking milk does not contribute to a deficiency in active vitamin D. To say that drinking milk does not contribute simply means that it does not CAUSE or make worse a deficiency in active vitamin D. That’s great, but it also doesn’t mean that the active vitamin D deficiency is resolved. It’s still possible that the deficiency remains, and old people are unable to absorb the calcium in milk. So, (C) does not fill in the gap identified above and lead to the author’s conclusion. Eliminate (C).
And here’s (A):
Quote:
(A) gives us two different pieces of information. First, it tells us that we have enough active vitamin D to absorb calcium. Then, it tells us that we have enough of any other substance needed in order to absorb calcium in the milk. Sure, the passage doesn’t mention other substances. But (A) tells us that, whatever other substances we may need, we have enough of them. Both pieces of information essentially say the same thing: we have everything that we need in order to absorb the calcium in milk. Now, we can be sure that the calcium deficiency will be resolved, and the blood pressure will not rise.
This fills the gap in the author’s reasoning that we identified, and it ensures the physician’s argument makes sense. Therefore, (A) is correct.
I hope that helps!
TheGraceful
19 Dec 2020, 17:39
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Thanks GMATNinja
Explanation made sense about A now.
I had got near A but only reason for me to eliminate that was mention of new information others substances
Thanks.
Explanation made sense about A now.
I had got near A but only reason for me to eliminate that was mention of new information others substances
Thanks.
