If the PFE does not have a route to the destination address of a packet， which action will be taken？（）

• A、The PFE floods the packet out of all interfaces.
• B、The PFE drops the packet and sends a destination unreachable notification back to source device.
• C、The PFE forwards the packet to the routing engine for further processing.
• D、The PFE queues the packet and sends a request for a layer 3 lookup to the routing engine.