Which of the Following Would Be an Example of a Cyber

Which of the following would be an example of a cyber smear scam?

A) ​Bill writes a fictional column about Exxon Mobile closing, hence driving down stock prices for his friends to purchase
B) ​Jenny sends emails with embedded worms to random Gmail users to obtain personal information in attempt to make a quick profit
C) ​Ryan steals the identity of his biology professors and using his credit card information to purchase his books for the system; afterward he quickly dumps the card to eliminate the trace
D) ​Frank spreads rumors about his ex-girlfriend Diana, including her promiscuity, sexual orientation, and prior drug use on Instagram