Pedophiles Using Cyberspace

Pedophiles using cyberspace:

A) are prevented from having contact with children by software filters.
B) are prevented from having contact with children by "guards" who monitor kids-only chat rooms.
C) can legally own or sell computer-created images of children engaged in sex, provided that no real children are shown or "composited" into a sex scene.
D) overwhelmingly are male rather than female.