Question ID:PT92 S1 Q1 Passage:Advertisement:  Omnicide kills more species of insects than any other insecticide. So Omnicide is the best insecticide for home gardeners, especially gardeners who cannot determine which insects are destroying their plants. Stem:Which one of the following, if true, most weakens the reasoning in the advertisement? Correct Answer Choice:BChoice A:Some of Omnicide's competitors kill almost as many species of insects as Omnicide does. Choice B:Many insect species are beneficial to garden plants, and Omnicide kills most of these beneficial species. Choice C:Merely protecting plants from attack by insect pests does not guarantee that the plants will be healthy. Choice D:Omnicide is more profitable for the manufacturer than most other insecticides made by the same company. Choice E:Omnicide does not kill weeds or mammalian pests such as gophers, moles, and groundhogs.