Into many kingdoms
After the fall of Roman empire, Germanic people spread all over europe and established small kingdom that ruled over the fragment of what used to be Roman's territory.
They defined the rules that they imposed to these territories as the 'barbarian law'
The Puritans chose to make a province in America where they could hone their religion. This was not a province where the opportunity of religion existed. It was one where Puritanism would turn into the State religion. All pioneers would be required to take after its religious standards. Guidelines were fairly strict.
Constants are kept the same in experiments :)
Improved income and mobility resulted in many things, and most of these answers are related to one another, but the best single option would be "<span>c. the development of suburbs."</span>