The comparison here is between development of compact disc and the new technology that revitalizes some of the classic recorded performances.
Now try looking at the options
(A)What was as remarkable as the development of the compact disc
(B) The thing that was as remarkable as developing
(C) No less remarkable than the development of the compact disc.
(D) Developing the compact disc has been none the less remarkable than
Improper comparison, also awkward
(E) Development of the compact disc has been no less remarkable as
Improper comparison,also awkward