OG5 阅读 Q30

Choice B is the best answer. Figure 1 shows that the organic yield as a percentage of conventional yield is similar for cereals and all crops, with both yielding roughly 75%. 
Choice A is incorrect because figure 1 shows that the organic yield as a percentage of conventional yield is higher for fruits (just under 100%) than for vegetables (just under 70%). Choice C is incorrect because figure 1 shows there were only 28 observations for oilseed crops. Choice D is incorrect because figure 1 shows that the organic yield as a percentage of conventional yield is higher for oilseed crops (approximately 90%) than for vegetables (just under 70%).