Sentence Correction

What seemed as remarkable as the medieval invention of playing cards are the thousands upon thousands of unique games that are shared by a worldwide audience.

A What seemed as remarkable as the medieval invention of playing cards
B No less remarkable than the medieval invention of playing cards
C The concept that had been as remarkable as the medieval invention of playing cards
D The medieval invention of playing cards has been nonetheless remarkable than
E Medieval invention of playing cards was just as remarkable as

OA is B
I will agree with option B. But what make s it different,\. Option A is not bad too.