Two HP Provision switches are configured as virtualrouters. How does the VRRP backup know if the VRRP
master is available and functioning?

A.
The VRRP master and backup exchange hello packetsover a VLAN dedicated to VRRP.

B.
The VRRP backup sends VRRP requests, and the masterreplies by sending a VRRP ACK message.

C.
The VRRP master and backup both implement bi-directional forwarding detection (BFD).

D.
The VRRP backup listens for the master’s VRRP advertisements.