When deploying policies after changes, what is crucial for ensuring effectiveness?

When deploying policies after making changes, restarting the application is crucial for ensuring effectiveness because many software systems and applications load their configurations and settings into memory during startup. When modifications are made to policies or configurations, these changes might not take effect until the application is restarted. This is because the application needs to reinitialize itself with the new settings, ensuring that they are recognized and correctly applied during operation. By restarting, it guarantees that any new rules or settings put in place are properly integrated into the program's behavior.

The other options, while they might address certain scenarios in specific environments, do not universally apply to the need for applying new policies effectively. For example, having all administrative accounts logged in may not facilitate the deployment of changes if those accounts are not related to the specific application needing a restart. Similarly, ensuring no active users are online or temporarily disabling the network could create unnecessary downtime or disrupt operations, not contributing to the effective implementation of new policies in the desired manner.