What action should be taken to verify that a license is properly activated on the new Controller node?

To ensure that a license is properly activated on the new Controller node, using the command to list the licenses is the most appropriate action. When the "tsm licenses list" command is executed, it provides a detailed overview of all the licenses currently installed on the instance, including their activation status. This command allows administrators to confirm that the necessary licenses are active and functioning as expected.

In contrast, other options may not provide the comprehensive verification needed. For example, commands that check or verify licenses might only confirm certain aspects rather than provide a complete list with activation details. Therefore, using "tsm licenses list" is the best approach for thoroughly confirming the status of the licenses on the new Controller node.