Which statement about the distributed SYN flood attack is true?

Which statement about the distributed SYN flood attack is true?

A.
A distributed SYN flood attack is carried out only by the valid address.

B.
A distributed SYN flood attack is carried out only by spoofed addresses.

C.
Botnet could be used to launch a distributed SYN flood attack.

D.
A distributed SYN flood attack does not completely deplete TCBs SYN-Received state
backlog.

E.
A distributed SYN flood attack is the most effective SYN flood attack because it targets
server memory.