The word "superfluous" (Para. 3) most probably means

A．Employment became widespread in the 17th and 18th centuries.
B．Unemployment will remain a major problem for industrialized nations.
C．The industrial age may now be coming to an end.
D．Some efforts and resources should be devoted to helping more people cope with the problem of unemployment.

A．most people who have been polled believe that the problem of unemployment may not be solved within a short period of time
B．many farmers lost their land when new railways and factories were being constructed
C．in preindustrial societies housework and community service were mainly carried out by women
D．some of the changes in work pattern that the industrial age brought have been reversed