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Nutritionists are advising people to eat more fish, since the omega-3

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Nutritionists are advising people to eat more fish, since the omega-3 [#permalink]

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Official Guide for GMAT Verbal Review 2016
Practice Question
Question No.:21
Page: 127


Nutritionists are advising people to eat more fish, since the omega-3 fatty acids in fish help combat many diseases. If everyone took this advice, however, there would not be enough fish in oceans, rivers, and lakes to supply the demand; the oceans are already being overfished. The obvious method to ease the pressure on wild fish populations is for people to increase their consumption of farmed fish.

Which of the following, if true, raises the most serious doubt concerning the prospects for success of the solution proposed above?


(A) Aquaculture, or fish farming, raises more fish in a given volume of water than are generally present in the wild.

(B) Some fish farming, particularly of shrimp and other shellfish, takes places in enclosures in the ocean.

(C) There are large expanses of ocean waters that do not contain enough nutrients to support substantial fish populations.

(D) The feed for farmed ocean fish is largely made from small wild-caught fish, including the young of many popular food species.

(E) Some of the species that are now farmed extensively were not commonly eaten when they were only available in the wild.

Originally posted by nycgirl212 on 28 May 2016, 18:26.
Last edited by Bunuel on 23 Apr 2018, 10:25, edited 5 times in total.
Edited the question.
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Re: Nutritionists are advising people to eat more fish, since the omega-3 [#permalink]

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New post 28 May 2016, 18:53
IMO D

a) Talks about the density of fish in farming - Out of Scope

b) nature of some fish farming is being discussed - Out of scope

c) Talks about the density of fish population in oceans - Out of scope

d) Gives info where farming depends on fish collected from oceans.. thereby giving evidence that to support farming fish from the oceans must be caught too.. a possible weakener to farming being the soln.- Hold

e) talks about the kinds of fish eaten - Out of scope

Hence D)

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Re: Nutritionists are advising people to eat more fish, since the omega-3 [#permalink]

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New post 28 May 2016, 19:41
nycgirl212 wrote:
Official Guide for GMAT Verbal Review, 2nd Edition
Practice Question
Question No.:21
Page: 127
Difficulty:


Nutritionists are advising people to eat more fish, since the omega-3 fatty acids in fish help combat many diseases If everyone took this advice, however, there would not be enough fish in oceans, rivers, and lakes to supply the demand; the oceans are already being overfished. The obvious method to ease the pressure on wild fish populations is for people to increase their consumption of farmed fish.Which of the following, if true, raises the most serious doubt concerning the prospects for success of the solution proposed above?

a) Aquaculture, or fish farming, raises more fish in a given volume of water than are generally present in the wild.
b) Some fish farming, particularly of shrimp and other shellfish, takes places in enclosures in the ocean.
c) There are large expanses of ocean waters that do not contain enough nutrients to support substantial fish populations.
d) The feed for farmed ocean fish is largely made from small wild-caught fish, including the young of many popular food species.
e) Some of the species that are now farmed extensively were not commonly eaten when they were only available in the wild.



The argument states that an increase in farmed fish consumption will help in increasing the wild fish population. We have to capture an statement that actually shows that farm fish rearing will actually affect wild fish population growth in some way.

Option (D) shows that. So since the feed of farm fishes is made of wild fish, in any case, the wild fish population is getting affected.

Let us cross-check options one by one.

(a) Actually supports the idea of farm fishing. Does not raise doubt. So we cant select this one.
(b) Irrelevant. No discussion about farm fish.
(c) Again this statement supports the idea of farm fish. Reject this option.
(d) This statement actually raises doubt. Hold.
(e) This also supports farm feed idea.

(D) is the answer.
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Re: Nutritionists are advising people to eat more fish, since the omega-3 [#permalink]

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New post 28 May 2016, 23:57
Plan suggests that aquaculture cause the decrease in the consumption of wild fish or this plan will not cause decrease in the current fish population in the wild.

Above is the assumption.

Choice D clearly states that aquaculture needs the wild fish as feed for farmed fish.

Thus D is the answer

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Re: Nutritionists are advising people to eat more fish, since the omega-3 [#permalink]

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New post 29 May 2016, 01:14
nycgirl212 wrote:
Official Guide for GMAT Verbal Review, 2nd Edition
Practice Question
Question No.:21
Page: 127
Difficulty:


Nutritionists are advising people to eat more fish, since the omega-3 fatty acids in fish help combat many diseases If everyone took this advice, however, there would not be enough fish in oceans, rivers, and lakes to supply the demand; the oceans are already being overfished. The obvious method to ease the pressure on wild fish populations is for people to increase their consumption of farmed fish.Which of the following, if true, raises the most serious doubt concerning the prospects for success of the solution proposed above?

a) Aquaculture, or fish farming, raises more fish in a given volume of water than are generally present in the wild.
b) Some fish farming, particularly of shrimp and other shellfish, takes places in enclosures in the ocean.
c) There are large expanses of ocean waters that do not contain enough nutrients to support substantial fish populations.
d) The feed for farmed ocean fish is largely made from small wild-caught fish, including the young of many popular food species.
e) Some of the species that are now farmed extensively were not commonly eaten when they were only available in the wild.


Eat fish = Combat diseases
Problem : There is not enough in the oceans and lakes ( If people start consuming fish ) fish due to overfishing
Solution : To ease pressure on wild fish ----> Increase consumption of farmed fish.


(D) Clearly calls into question the solution...

If feed for Farmed fish is made from the small wild-caught fish then the pressure on wild fish is not reduced and hence weakens the conclusion.


Hence the answer will clearly be (D)
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Re: Nutritionists are advising people to eat more fish, since the omega-3 [#permalink]

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New post 29 May 2016, 06:01
We are looking for something to weaken the theory : "The obvious method to ease the pressure on wild fish populations is for people to increase their consumption of farmed fish"

Option D is the only one that talks about the fact the wild fish would still keep decreasing as they are the main food for the farmed fishes.
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Re: Nutritionists are advising people to eat more fish, since the omega-3 [#permalink]

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New post 27 Jun 2016, 18:05
There are 2 assumption that say the pressure on wild fish will not be reduced.
first is that the amount of omega even after increasing the consumption is not sufficient to match the needs for omega of wild. Therefore go to wild.
The second is as mentioned in statement D. Which is weakened.
AC D is correct.
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Re: Nutritionists are advising people to eat more fish, since the omega-3 [#permalink]

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New post 10 Jul 2017, 23:35
straight with D.
Merged topics!
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Re: Nutritionists are advising people to eat more fish, since the omega-3 [#permalink]

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New post 15 Aug 2017, 23:23
D is the correct choice - Suggests the increasing consumption of farmed fish would require increased use of wild fish as feed for farmed fish and therefore would not ease pressure on wild fish populations.
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Re: Nutritionists are advising people to eat more fish, since the omega-3 [#permalink]

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New post 16 Apr 2018, 09:44
Nutritionists are advising people to eat more fish, since the omega-3 fatty acids in fish help combat many diseases. If everyone took this advice, however, there would not be enough fish in oceans, rivers, and lakes to supply the demand; the oceans are already being overfished. The obvious method to ease the pressure on wild fish populations is for people to increase their consumption of farmed fish.

Which of the following, if true, raises the most serious doubt concerning the prospects for success of the solution proposed above?

Mostly all the weaken the argument questions attacks the conclusion so, it’s very important to isolate the conclusion, it makes things easier.

COnclusion: Ease the pressure on wild fish populations is for people to increase their consumption of farmed fish.
Assumption: That this plan will get it's success and that consumtion of farmed fish is not going to impact the wild fish poplulation.


(A) Aquaculture, or fish farming, raises more fish in a given volume of water than are generally present in the wild.
Out of scope.

(B) Some fish farming, particularly of shrimp and other shellfish, takes places in enclosures in the ocean.
Out of scope.

(C) There are large expanses of ocean waters that do not contain enough nutrients to support substantial fish populations.
Not a weakner

(D) The feed for farmed ocean fish is largely made from small wild-caught fish, including the young of many popular food species.
That means farmed ocean fish feeds on small wild fish. This is certainly a weaakner because it has a negative impact on the conclusion.

(E) Some of the species that are now farmed extensively were not commonly eaten when they were only available in the wild.
Again it has no impact on the conclusion of the argument.
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Re: Nutritionists are advising people to eat more fish, since the omega-3 [#permalink]

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New post 28 Apr 2018, 23:25
Which of the following, if true, raises the most serious doubt concerning the prospects for success of the solution proposed above?

Our main CONCLUSION is that people increase consumption of farm fish so as to reduce the pressure on wild fish population.
We have to weaken the conclusion by selecting an answer choice which states the idea that consumption of wild fish population cannot be reduced and consequently the pressure from wild fish shall not be released

(A) Aquaculture, or fish farming, raises more fish in a given volume of water than are generally present in the wild.- Out of Scope answer choice

(B) Some fish farming, particularly of shrimp and other shellfish, takes places in enclosures in the ocean. Out of Scope answer choice

(C) There are large expanses of ocean waters that do not contain enough nutrients to support substantial fish populations. This is a strengthener answer choice as it supports going for farm fish population instead of wild fish hence not a weakener

(D) The feed for farmed ocean fish is largely made from small wild-caught fish, including the young of many popular food species.
CORRECT, a weakener answer choice as if feed for farm fish is made from wild fish it would directly affect wild fish population
(E) Some of the species that are now farmed extensively were not commonly eaten when they were only available in the wild.- Incorrect as this answer choice strengthens the conclusion
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Re: Nutritionists are advising people to eat more fish, since the omega-3 [#permalink]

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New post 31 May 2018, 07:47
IMO D - If the feed for farm fish is made from small wild-caught fish it would directly affect wild fish population. The goal was to save wild fish! This would weaken the argument completely.
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Re: Nutritionists are advising people to eat more fish, since the omega-3 [#permalink]

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New post 20 Jun 2018, 02:34
Conclusion: to ease pressure on the wild fish population, people should eat more farmed fish.

If we want to weaken this conclusion, we're looking for an answer choice that shows eating more farmed fish would not be beneficial for the wild fish population. (Or may even be harmful.)

D - The feed for farmed ocean fish is largely made from small wild-caught fish, including the young of many popular food species.--- shows that farmed fish require wild fish as food. Thus, when people eat more farmed fish, more wild fish will be required to feed the farmed fish, depleting the very wild fish populations the plan was intended to spare.
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Re: Nutritionists are advising people to eat more fish, since the omega-3   [#permalink] 20 Jun 2018, 02:34
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