Which of the following descriptions of cleaning centers is incorrect?

Which of the following descriptions of cleaning centers is incorrect?
A . Back-injection methods include: policy routing back-injection, static route back-injection, VPN back-injection and Layer 2 back-injection.
B . The cleaning device supports rich and flexible attack prevention technologies, but cannot defend against CC attacks and ICMP Flood attacks.
C . There are two methods of traffic diversion: static traffic diversion and dynamic traffic diversion.
D . The cleaning center completes functions such as diversion and cleaning of abnormal traffic, and reinjection of cleaned traffic.

Answer: B