Refer to the exhibit. A network technician is unable to ping from R1 to R2. Using the output of the show interfaces serial0/1 command, what should the administrator do to correct the problem?
A. Replace the serial cable between R1 and R2.
B. Reseat the serial connectors on the R1 and R2 routers.
C. Configure the serial0/1 interface on R2 with the no shutdown command.
D. Configure the serial0/1 interface on R1 with the clock rate 56000 command.
E. Configure the serial0/1 interface on R1 with the ip address 192.1.1.7 255.255.255.252 command.
