Sentence Correction

Not until 1932, nearly a century and a half after the first senatorial election, had a woman, Hattie Caraway of Arkansas, been elected to be a United States Senator.

a) had a woman, Hattie Caraway of Arkansas, been elected to be
b) was a woman, Hattie Caraway of Arkansas, elected as
c) was a woman, Hattie Caraway of Arkansas, elected to be
d) had a woman, Hattie Caraway of Arkansas, been elected for
e) had a woman, Hattie Caraway of Arkansas, been elected in order to be

OA: Later

is the ans B? plz ans so that can explain you the reason

Really a difficult one for me.
I chose answer C.
I eliminate A, D and E because they use the past perfect (which generally used to indicate a succession of events on the past, however there only one event in this sentence).
then I eliminate B because of 'elected as'.

Experts : can you help for this one please?

Answer: A

WAS modifies first senatorial election. Incorrect. Eliminate B & C
wordy - elected in order to be - Eliminate E
akward, gives a different meaning that Hattie Caraway selected to work for a Senator - Eliminate D