PREP_1-73 破解版的分析不太理解，多谢指点！

73.   (28457-!-item-!-188;#058&003634)

Evolutionary psychology holds that the human mind is not a "blank slate," but instead that it comprises specialized mental mechanisms that were developed as a way of solving specific problems human ancestors faced millions of years ago[BryanZhou1] .

(A) the human mind is not a "blank slate," but instead that it comprises specialized mental mechanisms that were developed as a way of solving

(B) the human mind is not a "blank slate" but instead comprises specialized mental mechanisms that were developed to solve

(C) the human mind, instead of a "blank slate," it comprises specialized mental mechanisms that have been developed to solve

(D) rather than it being a "blank slate," the human mind comprises specialized mental mechanisms that have been developed as a way of solving

(E) rather than the human mind's being a "blank slate," that it comprises specialized mental mechanisms that were developed as a way of solving

以下3种都有

not...but

not...but instead

not ... but rather ...

used to say that one thing is not true but a different thing is true
The problem is not their lack of funding, but rather their lack of planning.

从这里看无论哪种形式，都应该平行才对啊。不过 is not a "blank slate" but instead comprises specialized mental mechanisms中not...but instead结构不平行啊？a 'blank slate'是名词，但comprises specialized...是谓语结构啊？是不是我又忘记什么细节了？多谢！