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genetic modification

Expert replies
by mgmt_gmat » Fri Feb 12, 2010 1:54 am
Scientists have made genetic modifications to cotton to increase its resistance to insect
pests. According to farmers’ report, the amount of insecticide needed per acre to control
insect pests was only slightly lower for those who tried the modified seed than for those
who did not. Therefore, since the modified seed costs more than ordinary seed without
producing yields of higher market value, switching to the modified seed would be
unlikely to benefit most cotton farmers economically.


Which of the following would it be most useful to know in order to evaluate the argument?
A. Whether farmers who tried the modified cotton seed had ever tried growing other
crops from genetically modified seed
B. Whether the insecticides typically used on ordinary cotton tend to be more
expensive than insecticides typically used on other crops
C. Whether for most farmers who grow cotton it is their primary crop
D. Whether the farmers who have tried the modified seed planted as many acres of
cotton, on average, as farmers using the ordinary seed did
E. Whether most of the farmers who tried the modified seed did so because they had
previously had to use exceptionally large quantities of insecticide
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Source: — Critical Reasoning |

by komal » Fri Feb 12, 2010 2:12 am
A. Whether farmers who tried the modified cotton seed had ever tried growing other crops from genetically modified seed
Incorrect : Issue is about modified COTTON SEED, not other modified seed. Eliminated.

B. Whether the insecticides typically used on ordinary cotton tend to be more expensive than insecticides typically used on other crops
Incorrect : 'OTHER' crops is irrelevant to the scope of the argument.

C. Whether for most farmers who grow cotton it is their primary crop
Incorrect : 'PRIMARY CROP' out of scope.

D. Whether the farmers who have tried the modified seed planted as many acres of cotton, on average, as farmers using the ordinary seed did
Incorrect : Use of insecticide per acre is compared for both the seeds so average of new or old crop will not affect the result.

E. Whether most of the farmers who tried the modified seed did so because they had previously had to use exceptionally large quantities of insecticide
Correct : If the farmers who tried the modified seed had previously had to use exceptionally large quantities of insecticide, then it is possible that using modified seed will bring them economic benefits. The higher cost of modified seeds could be compensated by small quantities of insecticide. [/quote]
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by joseph32 » Sun May 15, 2016 11:39 pm
I like the explanation on E
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