Which of the Following Is True

Which of the following is true?

A) Deep Packet Inspection uses a variety of analytical and statistical techniques to evaluate the contents of message packets.
B) An Intrusion prevention system works in parallel with a firewall at the perimeter of the network to act as a filer that removes malicious packets from the flow before they can affect servers and networks.
C) A distributed denial of service attack is so named because it is capable of attacking many victims simultaneously who are distributed across the internet.
D) None of the above are true statements.