When drafting the Declaration of Sentiments that was adopted at the Seneca Falls Women's Rights Convention in 1848, included in it by the author, Elizabeth Cady Stanton, was a call for female enfranchisement.
(A) When drafting the Declaration of Sentiments that was adopted at the Seneca Falls Women's Rights Convention in 1848, included in it by the author, Elizabeth Cady Stanton, was a call for female enfranchisement.
(B) Including a call for female enfranchisement, a draft of the Declaration of Sentiments was adopted at the Seneca Falls Women's Rights Convention in 1848 that Elizabeth Cady Stanton wrote.
(C) When the Declaration of Sentiments drafted by Elizabeth Cady Stanton was adopted at the Seneca Falls Women's Convention in 1848, a call for female enfranchisement had been included in it.
(D) A call for female enfranchisement, included in Elizabeth Cady Stanton's draft of the Declaration of Sentiments in 1848, that was adopted by the Seneca Falls Women's Rights Convention.
(E) When Elizabeth Cady Stanton drafted the Declaration of Sentiments that was adopted at the Seneca Falls Women's Rights Convention in 1848, she included in it a call for female enfranchisement.
prep语法笔记中说C项的it指代不清，而E的很明确指的是Declaration of Sentiments。。。这里很想不通，个人看来两个it用的没有什么大的区别啊！！