Apolis of ancient greece was a a politically independent unit that included a city and surrounding land b colony controlled by the country that established it c fortified acropolis or hilltop in the center of a city d alliance of two or more cities formed for military protection

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explanation:

workers of lowell mills were greatly benefited for the waltham type of work which was more a paternalist kind, trying to protect the integrity of this little girls coming from small farmers and providing an adequate place of work, this in an effort to avoid the issues of bad place conditions and immorality that the people in bigger industrialized cities of great britain were experimenting.