I picked B.....as "her" doesn't have a clear referrant..."her" refers to Frances Perkins’ investigations instead of Frances Perkins

Please explain your choices!!!

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

I think it's E.
If we leave out the underlined part, this sounds correct.
So dogged were her investigations that Roosevelt recruited Perkins...
That leaves out A & D because they don't end with a 'that'.
B & C don't seem like well-formed sentences to me.
E makes a complete sentence with the correct form of parallelism,
So dogged were ..., so persistent her..., that....

A: and her lobbying for wage and hour reform was persistent,
Notice the change in tone of sentence fro part 1 to part 2 of the sentence. Hence ignore A

B: So.....so that is worng (no need for 2nd so). Ignore it.

C: Looks good. So dooged were her investigations, her persitence and her... that...looks very well alligned. But lets see at E and then decide.

D: Doesnot make any sense to me...ignore

E: I feel that "so" in underlined part is redundant.

I will go with C. What is the OA?

I would go for E
So x that y.
Whats the OA

It is E because you have parallelism with So dogged and so persistent.

I think it is C, because , the idiom usage is So.... that and further to that we can also observe that

It was "Frances Perkins’ investigations of the garment industry" and something else that lead someone to recruit Perkings to work within the goverment.

OA please.

C is not parallel

E is "so x..., so y..., that" or "so dogged, so persistent, that"

E it is.

OA is E

i reallly dbt in E...coz we already have SO in the beginning of the sentence and then it's redundant to repeat SO b4 'lobbying'...the correct idiomt is So...that NOT So xxx, so yyy, that...what say buddies??

The OA is E, and the OA is correct. This is a question simply testing knowledge of parallelism in sentence structure, not idioms or anything else. Don't let the length of the phrases throw you off, they are clauses that must match in structure! Therefore 'so dogged/ so persistent' is correct.

** A good tip to use is called "trim the fat". For a really long phrase within a sentence that is muddying the waters, cut it down to the essential parts and then try. Notice above: I changed the original phrasing:So dogged were Frances Perkins’ investigations of the garment industry to simply 'so dogged'. That made it easier to see that the second clause was unparallel: and her lobbying for wage and hour reform was persistent. Answer choice E matches the original sentence when the fat is trimmed, ie: so persistent her lobbying for wage and hour reform, that becomes 'so persistent.

Hope that helped!

But in E, there is no and before lobbying. Does this violate the parallelism rule?