When using Overlay Transport Virtualization （OTV）， how do L2 multicast frames traverse the overlay？（）

• A、 The L2 multicast frames are encapsulated in an OTV packet using the configured control-group multicast address for transport
• B、 The L2 multicast frames are dropped because multicast cannot be carried across the overlay 
• C、 The L2 multicast frames are encapsulated in an OTV packet using the configured data-group multicast address for transport
• D、 The L2 multicast frames are forwarded natively across the overlay based on their multicast IDs