What should you do?

Domain.com has hired you as a systems administrator for their network. The Domain.com network consists of a single Active Directory domain named Domain.com. All servers on the Domain.com network run Windows Server 2008 and all client computers run Windows XP Professional.
Domain.com has acquired another company named TestLabs Inc that contains an Active Directory domain named intranet.testlabs.com. A security policy of TestLabs Inc prevents internal DNS zone data to be transfered to users outside the testlabs.com network. During the course of the day you receive an instruction from the CIO to grant employees of Domain.com the necessary permissions to allow them to resolve names from intranet.testlabs.com.
What should you do?

A.
This can be accomplished by putting intranet.testlabs.com in the Active Directory of Domain.com.

B.
This can be accomplished by having a subzone established for the intranet.testlabs.com domain.

C.
This can be accomplished by reconfiguring the intranet.testlabs.com domain as a standard primary zone.

D.
This can be accomplished by setting conditional forwarding for the intranet.testlabs.com domain.

Explanation:
In order to permit a Domain.com user to resolve names from intranet.testlabs.com domain you need to set the conditional forwarding for the intranet.testlabs.com domain. A conditional forwarding is a DNS query setting that allows a DNS server to route a request for a particular name to another DNS server by specifying a name and IP address.