Once Efforts to Setup Blacklists Were Created and High Profile

Multiple Choice

Once efforts to setup blacklists were created and high profile spammers were starting to get receives prison sentences, one would think they would be discouraged. Nope. Which of the following is a technique that is now used to distribute SPAM and cloak its sender?

A) Social Networks
B) SMS, Skype, and IM SPAM
C) Spear phishing
D) Botnets