A leading figure in the Scottish enlightenment, Adam Smith’s two major books are to democratic capitalism what Marx’s Das Kapital is to socialism.

1. Adam Smith’s two major books are to democratic capitalism what

2. Adam Smith’s two major books are to democratic capitalism like

3. Adam Smith’s two major books are to democratic capitalism just as

4. Adam Smith wrote two major books that are to democratic capitalism similar to

5. Adam Smith wrote two major books that are to democratic capitalism what

这道题感觉到非常的迷惑和不解。如果说前面有a leading figure，要保持匹配和一致，就应该首先排除ABC。然后D里面选择。D肯定不对，similar to 后面应该是名词。如果按照平行结构来看，应该是E里面，前面是Adam Smith而后面是Marx's，感觉也不对啊。

恳请指点。

我觉得E选项的并列如下 major books that are to democratic capitalism

what Marx’s Das Kapital is to socialism.

Agree,

...two major books that to democratic capitalism what ....Marx’s Das Kapital(book) is to socialism

其实book后面的that从句是做book的定语的，而后面的结构是A is to B what C

is to D这样的结构

就是book are to democratic capitalism what Marx’s Das Kapital is to

socialism.后面的Marx’s Das Kapital 是指书，与前面的是同等概念