What Has Been the Effect of Mass Literacy and the Availability

What has been the effect of mass literacy and the availability of inexpensive printing techniques on sexually explicit material?

A) a dramatic fall in the incidence of child pornography
B) a gradual reduction in the pornographic content of mass-produced books and drawings
C) a dramatic increase in demand for sexually explicit material
D) a gradual increase in the number of laws directed at lesbian women and gay men that prohibit them from accessing to sexually explicit material