Refer to the exhibit. Which three statements accurately describe this GLBP topology？ （Choose three.）（）

• A、 Router A is responsible for answering ARP requests sent to the virtual IP address.
• B、 If Router A becomes unavailable， Router B will forward packets sent to the virtual MAC address of Router A
• C、 If another router were added to this GLBP group， there would be two backup AVGs
• D、 Router B is in GLBP listen state.
• E、 Router A alternately responds to ARP requests with different virtual MAC addresses.
• F、 Router B will transition from blocking state to forwarding state when it becomes the AVG