Which Is the Best Statement to Describe Greece's "Dark Age

Which is the best statement to describe Greece's "Dark Age"?

A) It occurred after the Mycenaeans defeated the Minoans.
B) It began after the Dorians defeated the Mycenaeans.
C) While arts and crafts became almost nonexistent, the people on the Greek peninsula did hold on to their writing.
D) Internal warfare brought an end to the Mycenaean age.
E) Experts are uncertain as to the exact cause of the fall of the Mycenaeans.