A company plans to develop a prototype weeding that uses cutting blades with and microprocessors that distinguish weeds from crop plants by optical sensors will reduce differences in shades of color. The inventor of the machine claims that it will reduce labor costs virtually eliminating the need for manual weeding. which of the following is consideration in favor of the company's implementing its plan to develop the prototype?

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 be economically bred to have a distinctive shade of color without altering their other characteristics.