GMAT Question of the Day - Daily to your Mailbox; hard ones only

 It is currently 16 Jun 2019, 23:58

### GMAT Club Daily Prep

#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

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

Author Message
TAGS:

### Hide Tags

Math Expert
Joined: 02 Sep 2009
Posts: 55623
Researcher: Hard water contains more calcium and magnesium than soft  [#permalink]

### Show Tags

09 Jul 2018, 01:43
00:00

Difficulty:

45% (medium)

Question Stats:

67% (01:52) correct 33% (01:57) wrong based on 220 sessions

### HideShow timer Statistics

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.

_________________
Retired Moderator
Joined: 30 Jan 2015
Posts: 805
Location: India
Concentration: Operations, Marketing
GPA: 3.5
Re: Researcher: Hard water contains more calcium and magnesium than soft  [#permalink]

### Show Tags

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.
_________________
The few, the fearless !

Thanks
Senior Manager
Joined: 03 Mar 2017
Posts: 302
Researcher: Hard water contains more calcium and magnesium than soft  [#permalink]

### Show Tags

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.
_________________
--------------------------------------------------------------------------------------------------------------------------
All the Gods, All the Heavens, and All the Hells lie within you.
Director
Joined: 04 Sep 2015
Posts: 561
Location: India
WE: Information Technology (Computer Software)
Researcher: Hard water contains more calcium and magnesium than soft  [#permalink]

### Show Tags

03 Feb 2019, 13:20
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.
whether the deficiency is common or not is not discussed, and is also out of scope.

(B) Magnesium is needed to prevent sodium from increasing blood pressure.
Good finding through the scientific research ,but it has nothing to do with our argument,clearly out of scope.

(C) As people age, their ability to metabolize magnesium deteriorates.
Sounds like a weakener but not a good one because we don't know about what age constitutes our case. so only age cannot be the deciding factor.

(D) The ingestion of magnesium supplements inhibits the effectiveness of many medicines used to treat high blood pressure and heart disease.
Good!!,but who is talking out suppliments… Also we see that the weaken choices have to be taken as true always.but this choice goes too far from the main argument and only addresses isolated cases of when suppliments are taken.

(E) Compounds commonly used to treat hypertension and heart disease diminish the body’s capacity to absorb and retain magnesium.
Best weakner,because it reverses the causality and leads to break the conclusion but stating that the compounds taken to treat such diseases cause the lowering of the magnesium.
Researcher: Hard water contains more calcium and magnesium than soft   [#permalink] 03 Feb 2019, 13:20
Display posts from previous: Sort by