[求助]OG086

oldersea

86. Which of the following, if true and known by the ranchers, would best help explain the results of the study?
(A) With private grazing land, both the costs and the benefits of overuse fall to the individual user.
(B) The cost in reduced land quality that is attributable to any individual user is less easily measured with common land than it is with private land.
(C) An individual who overuses common grazing land might be able to achieve higher returns than other users can, with the result that he or she would obtain a competitive advantage.
(D) If one user of common land overuses it even slightly, the other users are likely to do so even more, with the consequence that the costs to each user outweigh the benefits.
(E) There are more acres of grazing land held privately than there are held in common.

请问，D项这句话怎么翻译？

luoye1

一个人多用一点，其他人会变本加厉的多用，结果就是每人的成本都超过收益。

oldersea

翻译得好！

看看OG对D项的解释：
The study indicates that common lands are in better shape than private lands. The best answer, D, indicates that, contrary to Hardin’s claim, it is in each rancher’s self-interest not to overuse common land, which would explain why common lands are in relatively good shape.
D项这句话，到了OG的解释里，怎么就变成了“是每个rancher自己的兴趣来决定他不会去过度使用公共草地”呢？－－这个逻辑的弯是怎么拐过来的？