Refer to the exhibit. If router R1 is configured to run IS-IS with the given configuration and all interfaces are up/up, what action must you take so that the Ethernet 0/0 network can be advertised to potential IS-IS neighbors on the E0/1 interface?
A. Configure an NSAP address on R1.
B. Add the network 10.10.20.1 0.0.0.0 command to the R1 IS-IS process.
C. Configure the ip router isis command on R1’s interface E0/1.
D. Add the network 10.10.30.1 0.0.0.0 command to the R1 IS-IS process.
