og11-8的主语

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

OG解释说inventories 是主语， 所以谓语要复数形式。

我觉得Rising inventories 整个是主语，后面需要单数谓语。

请哪位牛人解答以下吧。