Which command would you use first to remove public folder database?

You have an Exchange 2010 SP1 organization with the following configuration:
Server1 roles – mailbox, hub transport
Server2 roles – client access server
Server1 holds the public folder database.
Which command would you use first to remove public folder database?

A.
Set-MailboxDatabase

B.
Remove-PublicFolder

C.
Remove-PublicFolderDatabase

D.
Get-MailboxDatabase

Explanation:
You have to remove all the public folders from a public folder database before you remove
the database.
Remove-PublicFolder -Identity “\My Public Folder” -Recurse: $True
Then, before you remove the database you must make sure it is not the default public folder
database for the mailbox database. If so, you must set another as default before removing it.

http://technet.microsoft.com/en-us/library/aa997202.aspx
http://technet.microsoft.com/en-us/library/dd876883.aspx