What does the command `whoami /all` return?

The command whoami /all is utilized in Windows operating systems to display comprehensive information about the currently logged-in user. This command provides not only the username but also details about the groups that the user is a part of, and importantly, it lists the privileges that are assigned to that user account. This information is crucial for security and administrative purposes, as it allows users to see their effective permissions within the system.

In contrast, the other options focus on different aspects of system information. The list of active processes is typically accessed using commands like tasklist or through the Task Manager interface, and command history is more often reviewed in the command prompt using the doskey /history command. Active network connections can be viewed using commands like netstat. Therefore, the specificity of whoami /all in revealing user and group information along with privileges makes it the correct answer.