Section D 6

The main reasons for the phenomenal growth of agribusiness over the last fifteen years are because of elevated land prices, the basing of retail marketing networks on produce imported from other states, and decreased competition from developers.

(A) because of elevated land prices, the basing of retail marketing networks

(B) a result of elevated land prices, retail marketing networks based

(C) that land prices are elevated, retail marketing networks are based

(D) elevated land prices, retail marketing networks based（D）

(E) because land prices are elevated, the basing of retail marketing networks

为什么B不对？是因为a result of不能和main reasons一致吗？

三个名词短语并列，

Resons .. are a result of ..., 名词短语 and 名词短语。“原因。。是。。。的结果”主语和表语不平行，