Refer to the exhibit. The loopback1 interface of the Atlanta router must reach the lookback3 interface of the Washington router.

The destination network 2000::1/128 is valid, but 2012::2 would be the IP address of an interface on the Atlanta router itself, not a valid next-hop IP for reaching a remote destination.

This configuration establishes a static IPv6 route on the Atlanta router for the destination network 2000::1/128 (likely Washington's Loopback1 interface) using 2012::1 as the next-hop IPv6 address, which must be an IP on a directly connected interface of the Washington router.

The destination 2000:3/123 is an incorrect IPv6 address format and prefix length for a /128 loopback address, and s0/0/0 alone is an outgoing interface, which is generally not preferred for static routes to a specific /128 host unless it's a point-to-point link.

This configuration establishes a static IPv6 route on the Atlanta router for the destination network 2000::3/128 (Washington's Loopback3 interface) using 2023::3 as the next-hop IPv6 address, which must be an IP on a directly connected interface of the Washington router.

The destination network 2000::1/128 is valid, but s0/0/1 is an outgoing interface and should be combined with a next-hop IP for reliability and proper routing table population, especially if it's not a point-to-point link.