一道英语单选求帮忙

题目

一道英语单选求帮忙
The impact of Thoreau's "On the Duty of Civil Disobedience" might not have been so far-reaching ____ for Elizabeth Peabody,who dared to publish the controversial way.
A.it is not being B.being it not C.had it not been D.it not having been
答案是选C,但是我不大懂,谁能帮我解释下?

答案

这是一道考查虚拟语气+倒装+省略的题哦!嘿嘿,本来这句话应该是The impact of Thoreau's "On the Duty of Civil Disobedience" might not have been so far-reaching if it had not been for Elizabeth Peabody,who dared to publish the controversial way..因为虚拟语气可以省略但是要倒装呀