In 1996 Congress passed a law that said online service providers like America Online
A are not liable for defamatory comments carried on the system if the material was provided by another content provider.
B are liable for all defamatory matter transmitted by the service.
C are liable for defamatory matter transmitted by the service if it has remained in the system for at least ten days.
D can be shut down for up to 30 days if they transmit defamatory matter.

