What was the effect of the 15th amendment?

a.
it legalized the “separate but equal” doctrine.
b.
it gave black men the right to vote.
c.
it struck down the jim crow laws in the south.
d.
it made former slaves citizens of the united states.

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 it would be capitalism