A router is connected to an HDLC circuit via a T1 physical interface. The SLA for this link only allows for a sustained rate of 768 kb/s. Bursts are allowed for up to 30 seconds at up to line rate， with a window Tc of 125 ms. What should the Bc and Be setting be when using generic traffic shaping？（）

• A、Be=46320000，B=96000
• B、Be=768000，Bc=32000
• C、Be=128000，Bc=7680
• D、Be=0，Bc=96000