Critical Reasoning
Verbal Ability

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While many people think of genetic manipulation of food crops as being aimed at developing larger and larger  , some plant breeders have in fact concentrated on discovering or producing dwarf varieties, which are roughly half as tall as normal varieties. Which of the following would, if true, most help to explain the strategy of the plantbreeders referred to above?


Plant varieties used as food by some are used as ornamentals by others.


The wholesale prices of a given crop decrease as the supply of it increases


Crops once produced exclusively for human consumption are often now used for animal feed.


Short plants are less vulnerable to strong wind and heavy rains


Nations with large industrial sectors tend to consume more processed grains.

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Option(D) is correct

Option A : This statement doesn't indicate whether those who use the plants as ornamentals desire shorter varieties.

Option B : At most this suggests that higher productivity is not as muchof an advantage as it otherwise would be. But there is nothing in the passage that indicates that smaller varieties would be more productive than normal-sized plants.

Option C : No reason is given for thinking that smaller varieties of plantsare more conducive to use for animal feed than are larger varieties.

Option D : Correct. This answer choice is correct because—unlike the other choices—it helps explain why smaller plant varieties could sometimes be preferable to larger varieties. A plant that isless vulnerable to wind and rain is apt to suffer less damage. This is a clear advantage that wouldmotivate plant breeders to try to discover or producesmallervarieties.

Option E : This has no direct bearing on the question posed. Processed grains are noteven mentioned in the passage, let alone linked to smaller plant varieties.

The correct answer is D.

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