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

• 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 addressof 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