单项选择题

A、0.62208Gbit/s-up 1.24416Gbit/s-down
B、2.48832Gbit/s-up 1.24416Gbit/s-down
C、0.62208Gbit/s-up 2.48832Gbit/s-down
D、2.48832Gbit/s-up 2.48832Gbit/s-down