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Civic Leader: The high motor neuron disease rate among our

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Civic Leader: The high motor neuron disease rate among our [#permalink] New post 01 Oct 2012, 09:23
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A
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C
D
E

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Civic Leader: The high motor neuron disease rate among our citizens is the result of hazardous material produced at your plant.
Board of Directors: Our statistics show that rate of motor neuron disease are high throughout the valley in which the plant is situated because local wells that supply drinking water are polluted, not because of the plant.
which of the following, if true, most seriously waekens the board's claim?

(A) The statistics do not differentiate between types of motor neuron disease.
(B) Nearby communities have not changed the source of their drinking water.
(C) motor neuron disease-causing chemicals used at the plant are discharged into nearby river and find their way into local wells.
(D) The plant both uses and produces cemicals that have been shown to the cause motor nauron disease.
(E) Some of the pollutants cited by the board as contaminating the local wells have been present in the wells for decades.
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Re: Critical Reasoning [#permalink] New post 01 Oct 2012, 09:39
Expert's post
shahebali wrote:
Civic Leader: The high motor neuron disease rate among our citizens is the result of hazardous material produced at your plant.
Board of Directors: Our statistics show that rate of motor neuron disease are high throughout the valley in which the plant is situated because local wells that supply drinking water are polluted, not because of the plant.
which of the following, if true, most seriously waekens the board's claim?

(A) The statistics do not differentiate between types of motor neuron disease.
(B) Nearby communities have not changed the source of their drinking water.
(C) motor neuron disease-causing chemicals used at the plant are discharged into nearby river and find their way into local wells.
(D) The plant both uses and produces cemicals that have been shown to the cause motor nauron disease.
(E) Some of the pollutants cited by the board as contaminating the local wells have been present in the wells for decades.



1) irrilevant

2) the problem is not the communities

3) maybe or not fault by the plant

4) weaken

5) if doing so could not be fault by the plant

D is the answer

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Re: Critical Reasoning [#permalink] New post 01 Oct 2012, 09:43
Weakening Question - To weaken the Board's Claim - we can either prove that
1) local drinking water is not polluted OR
2) material that caused the disease can affect the drinking water source.

On Reading the answer choices -

(A) Strengthens the Board's Claim by affirming that there are other reasons for disease to occur and not because of the plant.
(B) Out of Scope as what happens in nearby community is not related to board's claim
(C) Correct Choice which suggests that the disease causing material is polluting the drinking wells.
(D) Unrelated to board's claim
(E) Strengthens the board's claim that some other pollutants cause the disease, not the one produced / used at plant.



shahebali wrote:
Civic Leader: The high motor neuron disease rate among our citizens is the result of hazardous material produced at your plant.
Board of Directors: Our statistics show that rate of motor neuron disease are high throughout the valley in which the plant is situated because local wells that supply drinking water are polluted, not because of the plant.
which of the following, if true, most seriously waekens the board's claim?

(A) The statistics do not differentiate between types of motor neuron disease.
(B) Nearby communities have not changed the source of their drinking water.
(C) motor neuron disease-causing chemicals used at the plant are discharged into nearby river and find their way into local wells.
(D) The plant both uses and produces cemicals that have been shown to the cause motor nauron disease.
(E) Some of the pollutants cited by the board as contaminating the local wells have been present in the wells for decades.

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Re: Critical Reasoning [#permalink] New post 01 Oct 2012, 09:45
Civic Leader : Disease is caused because of the material produced at plant
Board of Director : Disease is caused because of local wells that supply drinking water and NOT because of the plant

To weaken the claim of the directors, we need some evidence that suggests that the plant is responsible for the disease.
Answer choice C does this.

Ans: c

OA please.
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Re: Critical Reasoning   [#permalink] 01 Oct 2012, 09:45
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