[求助]NewEast 讲义上疑难句

105. An invetory equal to 90 days sales is as much as even the strongest businesses carry, and then only as a way to anticipate higher prices or ensure against shortages.

(A) as much as even

(B) so much as even

(C) even so much as

(D) even as much that

(E) even so much that

这句话什么意思，and这里连接什么内容？

and表示并列...加上后面的then，表达一种承接式的并列.