This can be solved with one issue: the idiom "distinction between X and Y."
(A)/(B) "distinctions between X with Y" does not make sense.
(D) We can't say that designers' intelligencehas distinctions.
(E) We also can't say "distinctions of X to Y."
We can also get down to two--(D) and (E) with a second combination of idiom & parallel structure "not so much in X as in Y." We might get away with the simpler construction in (E), but it has other problems--the
...
(A)/(B) "distinctions between X with Y" does not make sense.
(D) We can't say that designers' intelligencehas distinctions.
(E) We also can't say "distinctions of X to Y."
We can also get down to two--(D) and (E) with a second combination of idiom & parallel structure "not so much in X as in Y." We might get away with the simpler construction in (E), but it has other problems--the
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