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
在OG的解释中说inventories是subject,所以后面的lead需要用复数。所以这里的rising应该是做限定性的修饰来修饰inventories.
但是从另外一个角度说,rising inventories可以整体作为一个主语吧,然后这样一个事情可以导致production cutbacks的发生。
就像manhattan里面的subject phrases and clauses:always singular的例子一样:having a good friends is a wonderful thing.