求教一道GWD上的逻辑，谢谢大家帮忙看下

lmylove

A major chemical spill occurred five years ago at Baker’s Beach, the world’s sole nesting ground for Merrick sea turtles, and prevented nearly all the eggs laid that year from hatching.  Yet the number of adult female Merricks returning to lay their eggs at Baker’s Beach has actually increased somewhat since five years ago.  Clearly, environmentalists’ prediction that the world’s Merrick population would decline as a result of the spill has proven unfounded.
Which of the following, if true, most seriously undermines the argument offered in refutation of the environmentalists’ prediction?

A.    The chemical spill five years ago occurred at a time when there were neither Merrick sea turtles nor Merrick sea turtle eggs on Baker’s Beach.
B.    Female Merrick sea turtles begin returning to Baker’s Beach to lay their eggs when they are ten years old.
C.    Under normal conditions, only a small proportion of hatchling female Merrick sea turtles survive in the ocean until adulthood and return to lay their eggs at Baker’s Beach.
D.    Environmental pressures unrelated to the chemical spill have caused a significant decline in the population of one of the several species of sea birds that prey on Merrick sea turtle eggs.
E.    After the chemical spill, an environmental group rejected a proposal to increase the Merrick sea turtle population by transferring eggs from Baker’s Beach to nearby beaches that had not been affected by the spill.

答案给的是B，但是B中说的母海龟10岁大的时候下蛋和原文有什么关系啊。。。谢谢大家了，哪位高人帮忙解答下？

lmylove

那我说说我的理解吧

这题是问哪个选项削弱了文中提出的反驳环境学家预测的观点，也就是应该是支持环境学家的观点，不知道这个我理解是不是对了。

原文主要是说5年前由于chemical spill的原因阻止了某种海龟在baker海滩下蛋了，不过从那以后在那下蛋的海龟的数量还增加了。于是作者说环境学家关于此种海龟数量将要减少的预测是不成立的。

b说海龟要到10岁才开始回到海滩下蛋。我觉得这个和原文没有关系啊，原文根本就没提到海龟下蛋的年龄的问题。我原本选的是E，我知道E也是无关选项，但是我真的想不通B是怎么削弱了反驳环境学家的作用的。请各位帮帮忙。谢谢

自由风暴

http://forum.chasedream.com/GMAT_CR/thread-373246-2-1.html