Which statement about HSRP, GLBP, and VRRP is true?

Which statement about HSRP, GLBP, and VRRP is true?
A . VRRP group members communicate using multicast address 224.0.0.102.
B . MAC address 0000.0c07.acOc indicates that default gateway redundancy is provided through GLB
D . HSRP group members communicate using multicast address 224.0.0.18.
E . GLBP uses UDP port 3222 (source and destination) for hello messages.

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Answer: D