Your network contains two Active Directory forests. The forests contain domain controllers that run Windows Server 2008 R2. The forests are configured as shown in the following table.

Forest name              Number of domains Number of users
Adatum.com             ?                                       6,000
Litwareinc.com       1                                       2,000

A one-way forest trust exists from adatum.com to litwareinc.com. You plan to deploy an Exchange Server 2010 Service Pack 1 (SP1) organization. The organization will contain Mailbox servers in litwareinc.com. You need to ensure that users in adatum.com can access the mailboxes in the Exchange organization.

What should you do?

A.
Deploy Mailbox servers to adatum.com. Create resource mailboxes in litwareinc.com.

B.
Change the forest trust to an external trust. Create linked mailboxes in litwareinc.com

C.
Create a forest trust from litwareinc.com to adatum.com. Create linked mailboxes in litwareinc.com.

D.
Create a forest trust from litwareinc.com to adatum.com. Create resource mailboxes in litwareinc.com.