Which command would you use to remove a SPAN session on a Cisco switch?

To remove a SPAN session on a Cisco switch, using the command that begins with "no monitor session" followed by the session identifier is the appropriate approach. This command effectively negates the specific SPAN session that you want to delete, allowing you to manage the monitoring configuration without affecting other sessions.

If you need to delete multiple sessions at once, the command that includes "all" is particularly useful, as it can streamline the process of removing all configured SPAN sessions in one command. This flexibility is essential for network administrators when adjusting the monitoring setup, ensuring they can quickly and efficiently manage the SPAN sessions as network demands change.

The other options do not provide the correct syntax for removing a SPAN session or may not exist in some versions of Cisco IOS, which confirms why this particular command is the best choice for the task at hand.