Which of the following statements about a backup router in a VRRP backup group are true? (Choose three.)
A. It receives VRRP packets from the master router and determines whether the master router is functioning properly.
B. It responds to the ARP requests sent from a virtual IP address.
C. It discards an IP packet whose destination MAC address is a virtual MAC address.
D. It discards an IP packet whose destination IP address is a virtual IP address.