GWD5-1， 望高手帮忙分析句子结构，感谢!

belt

No. 41 GWD 5-1:
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
如题，我对第一和第二小分句的结构分析不出，高手帮忙啊！答案是E

metoo9

upupupupup

metoo9

UP 求分析句子结构

pansean

同问。。。
看句意似乎第一分句导致第二分句的结果
A were so dogged & B was so persistent that xoxoxoxo