正解:C
The scenario requires that when the user 'CCNP' logs in, the 'show run' command is executed, and then the session is terminated immediately. This can be achieved by using the 'autocommand' keyword in the username command. The 'autocommand' keyword allows a specific command to be automatically executed after a user logs in. In this case, adding 'autocommand show run' to the 'username CCNP' command will execute the 'show run' command upon login and then log out the user.
References:
* Implementing and Operating Cisco Service Provider Network Core Technologies (SPCOR) course material.
* Cisco documentation on AAA (Authentication, Authorization, and Accounting) configuration.