In the network environment as shown in the figure, two routers are connected back-to-back through serial ports. The rate of the interconnection link must be set to 2Mbps. Which of the following statement below is correct?

A. It is necessary to confirm that the interface type and cable meet the V.24 regulations

B. Use the baudrate 2048000 command to configure the synchronization port of RTA.

C. Use the baudrate 2048000 command to configure the RTB synchronization port.

D. Use the virtual-baudrate 2048000 command to configure the synchronization port of RTB.

E. Use the bandrate2048000 command to configure the synchronization port of RTA, and use the virtual-baudrate2048000 command to configure the synchronization port of RTB.

Answer: B