Which Windows PowerShell cmdlet should you use?

Employees have Windows Mobile 6.5 devices. You manage the devices by using Microsoft System Center Mobile Device Manager (MDM) 2008. An employee has multiple managed devices. You need to prevent all of the employees managed devices from connecting to your network. Which Windows PowerShell cmdlet should you use?

A.
Add-BlockedDevice with the -Owner parameter

B.
Get-BlockedDevice with the -Owner parameter

C.
Remove-BlockedDevice with the -DeviceId parameter

D.
Update-MobilePolicyCalculation with the -Owner parameter