GMAT Sentence Correction (SC) | Re: In the Battle of Roncevaux Pass in 778, the rearguard of the Frankish

Hi Mike,
As usual your posts are great.
Can you please tell me the "due to" is modifying the previous clause's "made famous" , won't this change the entire meaning in the question in which "due to",an adjective, is modifying "was obliterated". Am sorry because i am non-native i don't know much about that war.
That's the main reason why i chose A.