A new virus is discovered in your Exchange Server 2007 organization. The file extension is .ext for this virus. The current settings for attachment filtering are configured to delete specified attachments and allow the message to be delivered. However, the virus files are not being filtered. You must stop the spread of this new virus. Neither the attachment nor the e-mail message should reach the e-mail recipient. The message that contains the virus should not generate a non-delivery report (NDR). You need to add a filter for the file extension of the virus. Which two cmdlets should you run? (Each correct answer presents part of the solution. Choose two.)

A.
Add-AttachmentFilterEntry -Name *.ext -type ContentType

B.
Add-AttachmentFilterEntry -Name *.ext -type FileName

C.
Set-AttachmentFilterListConfig -Action Reject -RejectMessage “None”

D.
Set-AttachmentFilterListConfig -Action SilentDelete