OG5 阅读 Q25

Choice B is the best answer. The previous question asks how environmentalists perceive conventional agriculture, with the answer being that they believe it produces a product that is less healthy and more environmentally destructive than that produced by organic farming. This is supported in lines 28-31("regard...disdain"): "They have embraced organic food as better for the planet—and healthier and tastier, too—than the stuff produced by agricultural corporations." 
Choices A, C, and D are incorrect because the lines cited do not support the answer to the previous question about how environmentalists perceive the efforts of conventional agriculture. Although the lines in choice A do touch on environmentalists' views, they indicate only that most environmentalists  don't view conventional agriculture's ability to "produce more food on less land" (line 25,"produce...be") as beneficial to the environment.  Choice C is incorrect because these lines address environmentalists' view of the environmental effects of conventional and organic farming but not the taste or nutritional value of the food produced. Choice D is incorrect because these lines focus on a drawback to organic farming.