To limit the movement of people into its borders. A country is least likely to use
A immigration quotas
B.
passports and visas
C. sanctions and embargoes
D. physical barriers

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.

i believe your answer is d)

it increased the power of the king of england.