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（B）

(E) are not new in principle; it

A和C 为什么不对呢

Which is the given answer anyway?

By guess, I'd go with E, though B makes sense as well.

(A) do not represent a new principle; it

A is wrong b/c we don't know what "it" refers to, "a new principle?" I don't think so. In fact, it wants to refer to an "old one" instead, but doesn't state that clearly.

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

C is wrong b/c "are" can not match "a new principle" here.