SC -809 不解

1.        The proposed urban development zones do not represent a new principle; it was employed in “Operation Bootstrap” in Puerto Rico.

(A) do not represent a new principle; it

(B) represent not a new principle, but one that

(C) are not a new principle; the same one

(D) are not a new principle, but one that

(E) are not new in principle; it

答案为B，不解，请指教

represent not 是否合适？

not 。。。 but

represent sth

叹，吾竟愚钝至此。。。

多谢！

I think if put "do not" before represent, the represent may need to be repeated twice. So to make the sentence concise, it is better to put the "not..but" phrase after the verb.