Carbon-14

[real2008]

Carbon-14 dating reveals that the megalithic monuments in Brittany are nearly 2,000 years as old as any of their supposed Mediterranean predecessors.
(A) as old as any of their supposed
(B) older than any of their supposed
(C) as old as their supposed
(D) older than any of their supposedly
(E) as old as their supposedly

Anybody please...to explain why A and C wrong? OA after discussion....

[Domnu]

[spoiler]The phrase 'as old as' is used when two objects are equivalent of age; here, we are trying to say that one object is 2000 years older than the other. Hence, the answer is probably B.[/spoiler]

[vcgmat]

According to me - the sentence says, ... nearly 2000 years ...
Hence it might be better to use "Older than" instead of "as old as".
Also "Mediterranean" qualifies "predecessors" - we need a adverb "supposedly" instead of "supposed".

[xcusemeplz2009]

D

[Domnu]

D

I don't think that this can be the answer since 'supposedly' isn't an adjective; it's an adverb.