Refer to the exhibit.

You are developing a migration plan to enable IPv6 in your IPv4 network. Starting at R3 and
assuming default IS-IS operations, what is likely to happen when you enable IPv6 routing on the
link from R3 to R2?

A.
Only R3 and R2 have IPv4 and IPv6 reachability.

B.
R2 receives an IPv6 default route from R3.

C.
Loopback reachability between all routers for IPv4 is lost.

D.
All routers except R2 are reachable through IPv4.

E.
R3 advertises the link from R3-R2 to R1, R4 and R5 only.