求问GMAT OG逻辑 74

For at least some food crops, specially treated seed that produces plants resistant to weed killers is under development. This resistance wears off as the plants mature. Therefore, the special seed treatment will be especially useful for plants that .

对于这些种子经过特殊处理可以应对除草剂的作物,等到作物成熟就无法再对抗除草剂了.所以要想用除草剂除掉杂草不伤害农作物,种植的作物要具备什么养的条件?

对于这种可以用special seed treatment作物,成熟了除草剂就不能用了
所以找选项关于成熟后就没有杂草烦恼的作物.D