The key to this problem is the idioms, as you mention, and parallelism. If you're comparing two things, the structure with which you compare them needs to be parallel.
For example: "Walking" and "running" must be in the same verb tense when we say: "I spent the morning walking and running." If we said "I spent the morning walk and to run" we'd violate parallel structure.
To the same end, we cannot say ""What was more fun than our trip to the movies has been our trip to the beach." Here, we are comparing the trip to the beach with the trip to the movies but using simple past tense "was" in one and the present perfect "has been" in the other. This is grammatically incorrect.
Does that help you see why A and B are incorrect?
Thanks Brett for the nice explanation.
I hope i have understood the error with options A and B, but to ascertain my understanding would request you to please validate the same.
The understanding is the problem with Option A and B is the incorrect usage of Past verb tense "was", which distorts the meaning of the sentence and also the sequence of the tenses is not clear.
It is comparing one thing in the past(was) with the other thing which is still going on (has been).
The correct usage could have been
"What is as remarkable as the development of the compact disc is the use of new technology......."
"What has been as remarkable as the development of the compact disc has been the use of new technology...."
Please validate my understanding ..and let me know if i have understood it correctly or not ? Also whether the correct usage which i have stated above is right ?