Sentence Correction

Warsaw began to rebuild not only << with brand-new structures, injecting a much-needed boost to the local economy, and also painstaking reconstructions of the old ones >> that had been demolished

(A)
with brand-new structures, injecting a much-needed boost to the local economy, and also painstaking reconstructions of the old ones


(B)
with brand-new structures, injecting a much-needed boost to the local economy, as well as painstaking reconstructions of the old ones


(C)
brand-new structures, injecting a much-needed boost to the local economy, but also painstaking reconstructions of the old ones


(D)
brand-new structures, injecting a much-needed boost to the local economy, but also painstakingly reconstructing the old ones


(E)
brand-new structures, injecting a much-needed boost to the local economy, but they also painstakingly reconstructing the old ones

Warsaw began to rebuild not only with brand-new structures, injecting a much-needed boost to the local economy, and also painstaking reconstructions of the old ones that had been demolished

(A)
with brand-new structures, injecting a much-needed boost to the local economy, and also painstaking reconstructions of the old ones


(B)
with brand-new structures, injecting a much-needed boost to the local economy, as well as painstaking reconstructions of the old ones


(C)
brand-new structures, injecting a much-needed boost to the local economy, but also painstaking reconstructions of the old ones


(D)
brand-new structures, injecting a much-needed boost to the local economy, but also painstakingly reconstructing the old ones


(E)
brand-new structures, injecting a much-needed boost to the local economy, but they also painstakingly reconstructing the old ones

C looks fine

Check for NOT ONLY BUT ALSO idiom construction. This is clearly stated in C. So OA is C.

This is a very simple question to Crack.

I know the idiom but I marked D thinking that:
"how can u REBUILD the RECONSTRUCTION?"