关于那道So dogged的语法题，可能比较权威

我昨晚写信一位比较文学教授（美国人）问了一下，以下是她的回信：

Dear YY, E is the best.  C sounded okay till I got to E, which was better.
The English in E sounds a little old-fashioned, so I can see why you
hesitated. Good luck on the test! SV

我以前给她干过活，她是哈佛比较文学的博士，应该错不了吧？

附我的信源文：

Dear XXXXXX

It's weird to ask you a GMAT problem, but could you help me to work out this one? Thank you very much!

This is a SENTENCE CORRECTION problem. The phrase in the parentheses may be an awkward or wrong expression. There are five choices and choice A doesn't make any change. I chose C but can't exclude E safely.

So dogged were Frances Perkins' investigations of the garment industry, (and her lobbying for wage and hour reform was persistent,) Alfred E. Smith and Franklin D. Roosevelt recruited Perkins to work within the government, rather than as a social worker.

A. and her lobbying for wage and hour reform was persistent,
B. and lobbying for wage and hour reform was persistent, so that
C. her lobbying for wage and hour reform persistent, that
D. lobbying for wage and hour reform was so persistent,
E. so persistent her lobbying for wage and hour reform, that

YY

我怎么认为还是选C来的正确些。如果选E的话，so persistent前面不需要一个and吗？

我之所以认为选C，是觉得her lobbying for wage and hour reform persistent是独立主格结构且因为so that句型使用了倒装而被放在了句子中间。

困惑ing！

谢谢分享!

我看这里加and倒是不对了，以为后面的so那部分不是完整句子，没有谓语。

为什么E不能理解成也是独立主格呢，我的理解是，第二个so那部分也是独立主格，只不过形式上刻意和前边保持一致而已，才成了现在这副样子，这可能也是E比C严谨的地方。

我自己也觉得c读起来舒服一些，不过也许就像她说的，e比较old-fashioned吧？

慎重起见，我再去问一些美国人。