The correct answer is 'net user /domain'. This command fetches user account details from the domain controller, which is a common task in active reconnaissance when targeting Windows domains. 'netstat -an' is used to display network connections, 'net accounts' shows the password policy for the local machine, 'whoami' outputs the current user context, 'ls' lists the content of a directory in Linux/Unix systems, and 'id' prints user identity in Linux/Unix.