Prior to World War II,many School Districts Banned Women from Teaching

Prior to World War II,many school districts banned women from teaching if they were married.But in the years during and following the war,school districts eliminated their policies restricting the employment of married women teachers.What would explain this reversal of policy?

A) School boards came to believe that married women were better teachers than single women.
B) The government enacted antidiscrimination legislation.
C) There was a greater need for teachers.
D) School boards took the view that "spinster" school teachers were highly likely to be lesbians.