What should you do from nwtraders forest?

Your network contains two Active Directory forests named contoso and nwtraders. The contoso forest contains Exchange 2003 SP2 Servers. The nwtraders forest contains Exchange 2010 SP1 Servers.

You need to move all mailboxes from contoso to nwtraders.

What should you do from nwtraders forest?

A.
Create a mail enabled contact for each mailbox in contoso. Run the Move-Mailbox cmdlet.

B.
Create a mail enabled user for each mailbox in contoso. Run the New-MoveRequest cmdlet.

C.
Create a linked mailbox for each mailbox in contoso. Run Move-Mailbox cmdlet.

D.
Create a shared mailbox for each mailbox in contoso. Run the New-MoveRequest cmdlet.

Explanation:
Microsoft Exchange Server 2010 supports remote mailbox moves via the New-MoveRequest cmdlet. To move a mailbox from an Exchange Server 2010, Exchange Server 2007, or Exchange Server 2003 forest to another Exchange 2010 forest, the Exchange 2010 target forest must contain a valid mail-enabled user with a specified set of Active Directory attributes. (Exchange 2010 doesn’t support moving an Exchange 2000 Server mailbox.) If there is at least one Exchange 2010 Client Access server deployed in the forest, the forest is considered an Exchange 2010 forest.

http://technet.microsoft.com/en-us/library/ee633491.aspx