I believe it is A, but I wouldn't go by just my answer.
The Dorian invasion is a concept devised by historians of Ancient Greece to explain the replacement of pre-classical dialects and traditions in southern Greece by the ones that prevailed in Classical Greece. The latter were named Dorian by the ancient Greek writers, after the Dorians, the historical population that spoke them.
The answer is: Runners allowed villages and cities throughout the empire to communicate quick with rulers far away.
Hope this helps!:)
Answer:because everybody has different beleifs just like with slaves they freed them but some people still would like to have them
Explanation:
A nonstop flight to Europe
