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Recently an unusually high number of dolphins have been foun

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Recently an unusually high number of dolphins have been foun [#permalink] New post 22 Feb 2017, 14:22
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Recently an unusually high number of dolphins have been found dead of infectious diseases, and most of these had abnormally high tissue concentrations of certain compounds that, even in low concentrations, reduce dolphins' resistance to infection. The only source of these compounds in the dolphins' environment is boat paint. Therefore, since dolphins rid their bodies of the compounds rapidly once exposure ceases, their mortality rate should decline rapidly if such boat paints are banned.


Which of the following, if true, most strengthens the argument?

A) The levels of the compounds typically used in boat paints today are lower than they were in boat paints manufactured a decade ago.
B) In high concentrations, the compounds are toxic to many types of marine animals.
C) The compounds break down into harmless substances after a few months of exposure to water or air.
D) High tissue levels of the compounds have recently been found in some marine animals, but there is no record of any of those animals dying in unusually large numbers recently.
E) The compounds do not leach out of the boat paint if the paint is applied exactly in accordance with the manufacturer's directions.
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Re: Recently an unusually high number of dolphins have been foun [#permalink] New post 06 Mar 2017, 07:45
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Explanation

All answers are wrong but C. E is a trap answer

Quote:
Therefore, since dolphins rid their bodies of the compounds rapidly once exposure ceases
Because we do not care about that the paint does not leak, we care that the mammals have no contact at all.

C is the best.
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Re: Recently an unusually high number of dolphins have been foun [#permalink] New post 11 Jul 2017, 03:30
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Why B is not the answer? since it supports the cause of banning of boat paint more strongly as as other aquatic mammals and species are also getting affevted which is strengthening the argument.
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Re: Recently an unusually high number of dolphins have been foun [#permalink] New post 11 Jul 2017, 06:53
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AmanSiso wrote:
Why B is not the answer? since it supports the cause of banning of boat paint more strongly as other aquatic mammals and species are also getting affected which is strengthening the argument.


B is wrong because we already know that is toxic. B nothing adds to the question.

C instead makes it stronger. IF the ban will take place, the compound soon will fade. This suggests us that - the other way around - the banned will last, the dolphins will die at an increasing rate.

Hope this helps
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Re: Recently an unusually high number of dolphins have been foun   [#permalink] 11 Jul 2017, 06:53
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