gwd 9-5

xuedidage

求助:

GWD 9-5:  

How do the inhabitants resolve the problem of unequal resource distribution:  

Answer is A, but I have B.  

Line 24 saiys:  although the people of the Andeans
highlands participated in such networks(trade), they relied
primarily on the maintenance of autonomous prouction
forces in as many ecological zones as possible.

This make me think it could be A or B....  Anybody know?  

xuedidage

testing...

adelineyao

The right answer should be E

there is no ecologic zone within the highland basin, therefore B is incorrect.

yuanlipinglily

gwd给的答案是c,我一开始也选e,请指点