[疑问]关于OG12-82

吟行

A sudden increase in the production of elephant ivory artifacts on the Mediterranean coast of North Africa
occurred in the tenth century. Historians explain this increase ○1as the result of an area opening up as a new source of ivory and argue on this basis ○2that the important medieval trade between North Africa and East Africa
began at this period.

Each of the following, if true, provides some support for the historians' account described above EXCEPT:
(A)    In East Africa gold coins from Mediterranean North Africa have been found at a tenth-century site but at no earlier sites.
(B)    The many surviving letters of pre-tenth-century North African merchants include no mention of business transactions involving East Africa.
(C)    Excavations in East Africa reveal a tenth-century change in architectural style to reflect North African
patterns.
(D)    Documents from Mediterranean Europe and North Africa that date back earlier than the tenth century
show knowledge of East African animals.
(E)    East African carvings in a style characteristic of the tenth century depict seagoing vessels very different from those used by local sailors but of a type common in the Mediterranean.

这是我对于这道题逻辑关系的理解：
果：M of NA的象牙工艺品产量上升
因：与果同期的 ○1象牙资源开放 ○2NA与EA之间的开始通商(说明10th世纪之前两地是没有通商的→之前M应该是没有象牙工艺品的)

那么我想问，这道题的正确选项是不是：1、与原文无关， 既非support也非weaken，2、 weaken选项
然后正确答案D正是前者？？？

吟行

哪位大虾来解答解答晚生的疑惑啊~~~~~~~~~~

mia113

我也只是新手
我当时做题的时候的思路是：
evidence：NA的象牙制品在10世纪的时候突然增加
历史学家说：NA和EA的贸易往来是从这个点（10世纪）开始
读完题后，我自己就预测： 如果出现evidence 证明它们之间在10世纪之前就有来往则weaken

看选项的时候：除了D，其他选项都是肯定了在10世纪之前没有往来，或者是support了10世纪那段时间的往来

楼主可以参考 http://forum.chasedream.com/GMAT_CR/thread-17156-1-1.html
http://forum.chasedream.com/GMAT_Preparation/thread-152989-1-1.html

zjsxsj

不知道楼主是不是题目看错了，这题是except题，abce都能support