A Rise in Female Prostitution in European Cities During the Later

A rise in female prostitution in European cities during the later nineteenth century can best be attributed to which of the following?

A) Heavy migration to cities by country women and their increasingly desperate struggle for urban economic survival
B) Greater public toleration of sex workers and abandonment of all municipal efforts to police the trade
C) The acceptance by clergymen of the sex trade as an economic necessity for poorer women