An administrator allocated 1GB of disk quotas but users continue to save beyond that. Which option should have been selected?

The best choice in this scenario is to deny access if the limit is reached. Allocating disk quotas is a way to manage and limit the amount of data that users can store on a server, and simply notifying users or enabling logging does not enforce the limits effectively. By implementing a policy that denies access once the quota is reached, no user can exceed the allocated 1GB, ensuring that storage resources are managed correctly and preventing potential over-utilization that could disrupt server performance or lead to data storage issues.

This method of enforcement helps maintain the integrity of the server's storage environment and ensures fair usage among all users. It provides a more decisive action compared to just logging an event or allowing users to save data with resultant warnings or notifications.