GWD31-8-13

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

     the key is e,while i choose C,why?anyone can help?

in my opinion, a leading figure,figure means people. so the subject of sentence is Adam Smith, not his books.

The following link is discussion concerning this question.

http://forum.chasedream.com/dispbbs.asp?boardID=23&ID=58647&page=1