GMAT PREP 1 Question - So Dogged were Frances Perkin's inves

[visitdhiraj]

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

The OA is "E"

I chose C

I would like to ask two questions

a.Could you run me through the errors in other choices

B. I was confused with choice e because I felt that an and was required before the so persistent..., moreover is a comma before that perfectly placed?

Awaiting your reply

Thanks

[jlucero]

I'm going to send you two links:

A break-down of the incorrect choices:
so-dogged-were-frances-perkins-t11448.html

The original sentence that includes the word AND:
http://www.nytimes.com/1993/11/14/books ... d=2&src=pm

As Dan says, I think they might have accidentally omitted the word and, but the other choices have other, larger errors.