Environmental organizations want to preserve the land surrounding the Wilgrinn Wilderness Area from residential development. They plan to do this by purchasing that land from the farmers who own it. That plan is ill-conceived: if the farmers did sell their land, they would sell it to the highest bidder, and developers would outbid any other bidders. On the other hand, these farmers will never actually sell any of the land, provided that farming it remains viable. But farming will not remain viable if the farms are left unmodernized, and most of the farmers lack the financial resources modernization requires. And that is exactly why a more sensible preservation strategy would be to assist the farmers to modernize their farms to the extent needed to maintain viability.
In the argument as a whole, the two boldface proportions play which of the following roles?
{环保机构想保存WWA周边土地(不让其被开发)【全文目的】。}他们决定从农民手中买下土地【被否决的计划】。这个计划是考虑不周的:如果农民卖土地,他们会卖给出价更高的人,开发商会比所有出价者出价更高【否决原因一】。{另一方面这些农民并不会真正的出售土地,因为这些土地还是可耕种的【否决原因二,也是之后新计划的基础】}。但是如果耕种不现代化的话,土地的可耕种性不会一直保持,而大部分农民缺乏资金购买现代化设备【支持新计划的基础】。这就是为什么更好的保存土地计划是帮助农民现代化耕种设备以保持土地可耕种性【支持的计划】。 选D。