The Dark Age era begins with a catastrophic event: the collapse of the Mycenaean civilization, when all major Mycenaean regional centres fell out of use after suffering a combination of destruction and abandonment. Linear B script, the Mycenaean writing system, was lost shortly after c. 1200 BCE; for this reason, we have no first-hand written documents of any kind for this period. Thus, our understanding of the Greek Dark Age relies largely on archaeological research.
I believe the answer is C
