根据提干关键词the last paragraph定位到文中最后一段,最后一段关键信息词while(尽管)引导的内容为重点信息:“尽管还有很长的路要走,这种趋势势不可挡”,故可以排除D: is not competitive enough with regard to its cost。而根据第二句“have a meaningful effect in...