Refer to the exhibit. A network administrator is trying to access a branch router using TACACS+ username and password credentials, but the administrator cannot ...

Refer to the exhibit.
A network administrator is trying to access a branch router using TACACS+ username and password credentials, but the administrator cannot log in to the router because the WAN connectivity is down. The branch router has following AAA configuration: aaa new-model aaa authorization commands 15 default group tacacs+ aaa accounting commands 1 default stop-only group tacacs+ aaa accounting commands 15 default stop-only group tacacs+ tacacs-server host 10.100.50.99 tacacs-server key Ci$co123
Which command will resolve this problem when WAN connectivity is down?