GWD-1-33逻辑题。CD换新版本以后怎么搜索讨论帖啊？？

emmawuxia

GWD1-Q33: D

A company plans to develop a prototype weeding machine that uses cutting blades with optical sensors and microprocessors微处理器 that distinguish weeds from crop plants by differences in shade色度 of color.  The inventor of the machine claims that it will reduce labor costs by virtually eliminating the need for manual weeding.

Which of the following is a consideration in favor of the company’s implementing its plan to develop the prototype?

支持题型

A.      ！There is a considerable degree of variation in shade of color between weeds of different species.

B.       The shade of color of some plants tends to change appreciably over the course of their growing season.

C.      When crops are weeded manually, overall size and leaf shape are taken into account in distinguishing crop plants from weeds.

D.      Selection and genetic manipulation allow plants of virtually any species to be economically bred to have a distinctive shade of color without altering their other characteristics.

E.       Farm laborers who are responsible for the manual weeding of crops carry out other agricultural duties at times in the growing season when extensive weeding is not necessary.

我觉得这题应该选A啊。可是怎么有答案说选D呢？那不是无关选项吗？到底怎么回事呢？有没有NN可以解释一下呢