Which of the following statements regarding the VRRP backup are true? (Multiple Choice)

Which of the following statements regarding the VRRP backup are true? (Multiple Choice)
A . When the VRRP backup receives VRRP packet from the VRRP master, it can determine whether the master is in the normal state.
B . When receiving VRRP packets with the priority of 0, the backup directly switches to be the master.
C . The backup discards IP packets destined for the virtual MAC address.
D . The backup responds to IP packets destined for the virtual IP address.

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Answer: ABC