[求助] GWD 03-8

oneseven

Q8:

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 as the result of an area opening up as a new source of ivory and argue on this basis that the important medieval trade between North Africa and East Africa began at this period.

 

Each of following, if true, provides some support for the historians’ account described above EXCEPT:

 

1. In East Africa gold coins from Mediterranean North Africa have been found at a tenth-century site but at no earlier sites.
2. The many surviving letters of pre-tenth-century North African merchants include no mention of business transactions involving East Africa.
3. Excavations in East Africa reveal a tenth-century change in architectural style to reflect North African patterns.
4. Documents from Mediterranean Europe and North Africa that date back earlier than the tenth century show knowledge of East African animals.
5. 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.

請問為何答案是D呢   可以解釋一下嗎   謝謝

bmlf_001

北非的公元十世纪前的文件记录了只有东非才有的动物，说明十世纪之前两地可能已经有了交流，所以削弱。