Why do you think Albert Einstein regretted his decision to help construct the bomb?

Einstein was not involved in the bomb's creation. He was not allowed to work on the Manhattan Project — he was deemed too big a security risk, as he was both German and had been known as a left-leaning political activist.

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.

b, the anti immigrant fervor