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A recent examination of the waters of the Southern Ocean showed a subs

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Re: A recent examination of the waters of the Southern Ocean showed a subs [#permalink]
Claim: Increase in pollution due to Increase in operations of Gaston inc
Q: What supports the claim, and that claim is NOT due to oil spills
A and D both work.

Sahil2208 wrote:
A recent examination of the waters of the Southern Ocean showed a substantial increase in pollution levels, which is usually caused by routine oil spills during industrial drilling operations in the area. Last month, an article published in the biannual newsletter of a prominent environmental organization attributed this increase to the operations of Gaston Inc., an oil company with several large deep-water drilling operations. This claim is not undermined by the finding that none of Gaston Inc.’s oil plants in the Southern Ocean had any oil spills, because ____________.

A. most increases in the pollution levels of oceans take place because of deep-water drilling operations
Since Gaston has other drilling projects and none of those projects caused the oil spills, as mentioned in the premise. Hence incorrect

B. oil usually floats several feet below the surface of the ocean rather than at the surface itself
Same reasoning as A. If this was true, then all the other Gaston drilling projects would have caused oil spills. Hence eliminated

C. pollutants that enter the ocean sometimes take decades to affect the marine environment
Irrelevant. Eliminated

D. tankers that transport oil from drilling plants to offshore locations often develop leaks.
This might be the case because the drills are not causing the oil spills but the fault is in the transportation of the oil.

E. calculated amounts of oil are sometimes deliberately discarded by oil plants to maintain water pressure in the area surrounding the plan
Same reasoning as A. If this was true, then all the other Gaston drilling projects would have caused oil spills. Hence eliminated

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Re: A recent examination of the waters of the Southern Ocean showed a subs [#permalink]
Bunuel wrote:
A recent examination of the waters of the Southern Ocean showed a substantial increase in pollution levels, which is usually caused by routine oil spills during industrial drilling operations in the area. Last month, an article published in the biannual newsletter of a prominent environmental organization attributed this increase to the operations of Gaston Inc., an oil company with several large deep-water drilling operations. This claim is not undermined by the finding that none of Gaston Inc.’s oil plants in the Southern Ocean had any oil spills, because ____________.

A. most increases in the pollution levels of oceans take place because of deep-water drilling operations

B. oil usually floats several feet below the surface of the ocean rather than at the surface itself

C. pollutants that enter the ocean sometimes take decades to affect the marine environment

D. tankers that transport oil from drilling plants to offshore locations often develop leaks

E. calculated amounts of oil are sometimes deliberately discarded by oil plants to maintain water pressure in the area surrounding the plant

This is a CR Butler Question

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­
The premise says that "none of Gaston Inc.’s oil plants in the Southern Ocean had any oil spills" which means oil did not spill due to deep-water drilling by Gatson Inc. Option (A) is out.
Option (B) is irrelevant because the oil that has spilled is what our concern is, not where it is floating.
Option (C) is also irrelevant.
Option (D), well, is a possible way that leads to pollution.
Option (E) is again irrelevant.

Option (D) is correct.
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Re: A recent examination of the waters of the Southern Ocean showed a subs [#permalink]
Hmm, I actually took the increase in pollution purely because of the deep water drilling operations and not because of oil spills.
samarpan.g28 wrote:
Bunuel wrote:
A recent examination of the waters of the Southern Ocean showed a substantial increase in pollution levels, which is usually caused by routine oil spills during industrial drilling operations in the area. Last month, an article published in the biannual newsletter of a prominent environmental organization attributed this increase to the operations of Gaston Inc., an oil company with several large deep-water drilling operations. This claim is not undermined by the finding that none of Gaston Inc.’s oil plants in the Southern Ocean had any oil spills, because ____________.
A. most increases in the pollution levels of oceans take place because of deep-water drilling operations
B. oil usually floats several feet below the surface of the ocean rather than at the surface itself
C. pollutants that enter the ocean sometimes take decades to affect the marine environment
D. tankers that transport oil from drilling plants to offshore locations often develop leaks
E. calculated amounts of oil are sometimes deliberately discarded by oil plants to maintain water pressure in the area surrounding the plant
This is a CR Butler Question
Check the links to other Butler Projects:

­
The premise says that "none of Gaston Inc.’s oil plants in the Southern Ocean had any oil spills" which means oil did not spill due to deep-water drilling by Gatson Inc. Option (A) is out.
Option (B) is irrelevant because the oil that has spilled is what our concern is, not where it is floating.
Option (C) is also irrelevant.
Option (D), well, is a possible way that leads to pollution.
Option (E) is again irrelevant.
Option (D) is correct.

­
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Re: A recent examination of the waters of the Southern Ocean showed a subs [#permalink]
­can someone explain how is option E not relevant? if there is oil released...it could be responsible for the pollution right?
and in option D we don't know anything about the tankers...

1) wether the  tankers were going by road?
2) wether the tankers spilt inside the ocean or just on road not affecting the ocean
3) more importantly it is not given that it is the tanker for the given company... then how can we say that the company is responsible.....

E seems to be a better choice... if such plants release the chemicals... i don't need to know it is the only company..... just that it contributes to the pollution which is supported by option E.

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Re: A recent examination of the waters of the Southern Ocean showed a subs [#permalink]
arjun221199 wrote:
­can someone explain how is option E not relevant? if there is oil released...it could be responsible for the pollution right?
and in option D we don't know anything about the tankers...

1) wether the  tankers were going by road?
2) wether the tankers spilt inside the ocean or just on road not affecting the ocean
3) more importantly it is not given that it is the tanker for the given company... then how can we say that the company is responsible.....

E seems to be a better choice... if such plants release the chemicals... i don't need to know it is the only company..... just that it contributes to the pollution which is supported by option E.

1. Stem says: not undermined by the finding that none of Gaston Inc.’s oil plants in the Southern Ocean had any oil spills
E says: sometimes

Doesn't (E) oppose the premise?

2.  E says: oil are sometimes deliberately discarded by oil plants: How do you know that Gaston Inc. is among those oil plants? Now, you may say the same about (D).
But notice the weak word ''sometimes'' and a better stronger word ''often'' in (D)

Re: A recent examination of the waters of the Southern Ocean showed a subs [#permalink]
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