With regards to ancient history, the areas on this map marked with an "x" all have what in common?
a) none were able to trade over great distances.
b) none lasted out of the ancient era of history.
c) all were protected from invasion by geographic features.
d) all had civilizations that were centered along major rivers.

d) all had civilizations that were centered along major rivers.

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.

based on this information, i would advocate against sweatshop labour because it exploits workers in unsafe working conditions with little pay. though sweatshops produce inexpensive goods, they harm the environment, workers, and often use unsafe materials to make consumer goods.