While many people think of genetic manipulation of food crops as being aimed at developing larger and larger plant varieties, 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 plant breeders referred to above?
(A) Plant varieties used as food by some are used as ornamentals by others.
(B) The wholesale prices of a given crop decrease as the supply of it increases.
(C) Crops once produced exclusively for human consumption are often now used for animal feed.
(D) Short plants are less vulnerable to strong wind and heavy rains.
(E) Nations with large industrial sectors tend to consume more processed grains.
题目分析：此题问题提示非常明确，问为什么很多人会用新的plant，不管答案怎么写，好歹应该是这种新的plant的优点吧，五个选项里只有D明确的说是这种新plant的优点，选D。问题分析的越精确，其实对原文的依赖程度越小！
