Never before in the history of music have
musical superstars been able to command so extraordinary fees of the kind
they do today.
(A) so extraordinary fees of the kind
they do today
(B) so extraordinary fees as they are
today
(C) such extraordinary fees as they do
today
(D) such extraordinary fees of the
kind today’s have（C）
(E) so extraordinary a fee of the kind
they can today
1）关于so和such可以理解成so修饰extraordinary，即和以前比现在的fees so
extraordinary，也可以理解成such修饰中心名词fees，我不明白第一种理解为什么不对
2）这句正过来是不是应该是no superstars have been able
to command so extraordinary fees as they (are able to command) today.
那么as后应该用they are, 为什么答案用they do?
thanks | 
