[求助]OG11-8关于省略问题？

Rising inventories,
            when unaccompanied correspondingly
                by increases in sales, can lead to production cutbacks that would hamper

economic growth.

(A)         when unaccompanied correspondingly by increases in sales, can lead

(B)         when not accompanied by corresponding increases in sales, possibly leads

(C)        when they were unaccompanied by corresponding sales increases, can lead

(D)        if not accompanied by correspondingly increased sales, possibly leads

(E)         if not accompanied by corresponding increases in sales, can lead

答案是E。我只知道条件状语从句的主谓语同主句一致时必须省略，那么这里IF后只是和句子主语一致，主谓语也可以省略么？

谢谢

是呀