About the description about the preemption function of VGMP management, which of the following statements is wrong?
A . By default, the preemption function of the VGMP management group is enabled.
B . By default, the preemption delay of the VGMP management group is 40s.
C . Preemption means that when the faulty primary device recovers, its priority will be restored. At this time, it can regain its own state.
D . After the VRRP backup group is added to the VGMP management group, the original preemption function on the VRRP backup group is invalid.
Answer: B