Europe's economy improved significantly as new roads and infrastructure were developed.
Former Roman lands were split up and claimed by Germanic kingdoms.
There was a definite decline in Christianity, its followers, and its spread across lands.
Trade increased in the West, resulting in an end to the recession taking place at that time.
The answer to your question is,
B. Technology made manufacturing more efficient.
-Mabel <3
Army was fierce and protective, girls received some education and women had more freedom than in other poleis. First, the army of Sparta was the strongest fighting force in Greece. ... The Spartans believed this made them strong and better mothers.