What was core and what technique did they use to protest?

The Congress of Racial Equality (CORE) was an African-American group of activists for civil rights of the AA people.

They had the idea of achieving change through nonviolence.

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.