Which two statements are true about MLP interleaving？ （）

• A、 It fragments and encapsulates all packets in a fragmentation header.
• B、 Packets smaller than the fragmentation size are interleaved between the fragments of thelarger packets.
• C、 Packets larger than the fragmentation size are always fragmented， and cannot be interleaved，even if the traffic is voice traffic.
• D、 It fragments and encapsulates packets that are longer than a configured size， but does not encapsulate smaller packets inside a fragmentation header.