Sentence Correction (SC) | Re: The political motivation behind the Livonian Crusade was not

The political motivation behind the Livonian Crusade was not so much to convert to Christianity the last non-Christian people in Europe, and also for establishing control over the commerce of the entire Baltic region.
(A) and also for establishing
(B) yet to establish
(C) while establishing
(D) as to establish
(E) but more for establishing

Idiom is - Something was not so much to do x as to do y. - Only D fits in.

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