Sc

[Nycgrl]

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

OA is B...Pls explain

[reachac]

The sentence intends to present a contrast. One correct idiom to do so is "Not X, but Y"

So we get narrow down to B and D

But D says that "proposed urban development zones are a new principle" which cant be logically correct, dev zones can represent a principle but they cannot be the principle themselves.

So choose B