Plant scientists have been able to genetically engineer vegetable seeds to produce crops that are highly resistant to insect damage. Although these seeds currently cost more than conventional seeds, their cost is likely to decline. Moreover, farmers planting them can use far less pesticide, and most consumers prefer vegetables grown with less pesticide, therefore, for crops for which these seeds can be developed, their use is likely to become the norm.

which of the following would be most useful to know in evaluating the argument above?

【选项】Whether most varieties of crops currently grown commercially have greater natural resistance to insect damage than did similar varieties in the past.