请教NN们关于11版OG上第27题

A drug that is highly effective in treating many types of infection can, at present, be obtained only from the bark of the ibora, a tree that is quite rare in the wild. It takes the bark of 5,000 trees to make one kilogram of the drug. It follows, therefore, that continued production of the drug must inevitably lead to the ibora’s extinction.

Which of the following, if true, most seriously weakens the argument above?

(A) The drug made from ibora bark is dispensed to doctors from a central authority.

(B) The drug made from ibora bark is expensive to produce.

(C) The leaves of the ibora are used in a number of medical products.

(D) The ibora can be propagated from cuttings and grown under cultivation.

(E) The ibora generally grows in largely inaccessible places.

我在d和e之间徘徊，答案是d,

e为什么不对呢

e实际上是无关的，要熟悉GMAT逻辑题的这类无关情况。说了要这么多树皮就是要这么树皮，你来说个这种树生长的地方很难到达，在该逻辑路线之外了。

要钻牛角尖的话，难以到达不代表不能到达，何况只是generally，而不是全部，难说即使只有少数地方生长这种树，但其产量也足以采集足够的树皮来做这种药呢？

谢谢john

偶刚开始复习，还没跟上 GMAT的思路，每天都被它弄得特别晕，郁闷中~~