Refer to the exhibit. A network administrator is troubleshooting IS-IS routing. Currently, RTA is not
receiving Link State Packets (LSPs) from RTB. What is the problem?

A.
RTA must be configured with theisis circuit-type level-1 under interface s0.

B.
RTA and RTB are configured in different areas.

C.
RTA and RTB should both be configured for is-type level-2 under routerisis.

D.
RTB must be configured with the is-type level-1 command under routerisis.