The author mentions all of the following inventions as examples of dramatic technological innovations EXCEPT the

A．They did not employ women in factories.
B．They tended to employ single rather than married women.
C．They employed women in only those jobs that were related to women's traditional household work.
D．They resisted technological innovations that would radically change women's roles in the family.

A．The effects of the mechanization of women's work have not borne out the frequently held assumption that new technology is inherently revolutionary.
B．Recent studies have shown that mechanization revolutionizes a society's traditional values and the customary roles of its members.
C．Mechanization has caused the nature of women's work to change since the Industrial Revolution.
D．The mechanization of work creates whole new classes of jobs that did not previously exist.