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Researcher: Hard water contains more calcium and magnesium than soft

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Researcher: Hard water contains more calcium and magnesium than soft  [#permalink]

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New post 09 Jul 2018, 01:43
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A
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E

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  45% (medium)

Question Stats:

66% (01:50) correct 34% (02:17) wrong based on 87 sessions

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Researcher: Hard water contains more calcium and magnesium than soft water contains. Thus, those who drink mostly soft water incur an increased risk of heart disease, stroke, and hypertension, for people being treated for these conditions tend to have lower levels of magnesium in their blood.

Which one of the following, if true, most undermines the researcher’s argument?


(A) Magnesium deficiency is not uncommon, even in relatively prosperous countries with an otherwise generally adequate diet.

(B) Magnesium is needed to prevent sodium from increasing blood pressure.

(C) As people age, their ability to metabolize magnesium deteriorates.

(D) The ingestion of magnesium supplements inhibits the effectiveness of many medicines used to treat high blood pressure and heart disease.

(E) Compounds commonly used to treat hypertension and heart disease diminish the body’s capacity to absorb and retain magnesium.

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Re: Researcher: Hard water contains more calcium and magnesium than soft  [#permalink]

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New post 09 Jul 2018, 03:50
Cause : Low level of Magnesium
Effect : Heart Disease

(A) Magnesium deficiency is not uncommon, even in relatively prosperous countries with an otherwise generally adequate diet. --> Irrelevant

(B) Magnesium is needed to prevent sodium from increasing blood pressure. --> Strengthen

(C) As people age, their ability to metabolize magnesium deteriorates. --> Irrelevant

(D) The ingestion of magnesium supplements inhibits the effectiveness of many medicines used to treat high blood pressure and heart disease.--> Irrelevant

(E) Compounds commonly used to treat hypertension and heart disease diminish the body’s capacity to absorb and retain magnesium. --> Correct, Weakens the argument by stating that the effect could be the cause instead

Hence, E.
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Researcher: Hard water contains more calcium and magnesium than soft  [#permalink]

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New post 09 Jul 2018, 11:28
1
The conclusion is that those who drink mostly soft water would incur an increased risk of heart disease, stroke, and hypertension.

The evidence put forward is :
1.For people being treated for these conditions tend to have lower levels of magnesium in their blood.
2.Hard water contains more calcium and magnesium than soft water contains.

We have to weaken the conclusion saying that it is not because of soft drinking water that people would incur an increased risk of heart disease, stroke, and hypertension.

(A) Magnesium deficiency is not uncommon, even in relatively prosperous countries with an otherwise generally adequate diet.
Irrelevant.

(B) Magnesium is needed to prevent sodium from increasing blood pressure.
This is strengthening the claim. If magnesium is needed then those who drink soft water would incur am increased risk.

(C) As people age, their ability to metabolize magnesium deteriorates.
This will be applicable to both hard water drinkers and soft water drinkers. So this is irrelevant.

(D) The ingestion of magnesium supplements inhibits the effectiveness of many medicines used to treat high blood pressure and heart disease.
This will be applicable to both hard water drinkers and soft water drinkers. So this is irrelevant.

(E) Compounds commonly used to treat hypertension and heart disease diminish the body’s capacity to absorb and retain magnesium.
This reverses the cause and effect. This says that the compounds commonly used to treat hypertension diminish the body’s capacity to absorb and retain magnesium and not the low level of magnesium.

IMO E is the correct answer.
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Researcher: Hard water contains more calcium and magnesium than soft &nbs [#permalink] 09 Jul 2018, 11:28
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