Which is an example of a public good? a) a rock band b) a car c) the army d) bread

as much as I want to say bread; I'm going to go with C.

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.

which time period is this? or is this story fictional, i'm going to need more info to answer this question