Your network contains an Active Directory domain named contoso.com. A partner company has an Active
Directory domain named nwtraders.com. The networks for contoso.com and nwtraders.com connect to each
other by using a WAN link.
You need to ensure that users in contoso.com can access resources in nwtraders.com and resources on the
Internet.
What should you do first?

A.
Modify the Trusted Root Certification Authoritiesstore.

B.
Modify the Intermediate Certification Authoritiesstore.

C.
Create conditional forwarders.

D.
Add a root hint to the DNS server.

Explanation:
Reference:
MCTS 70-640 Cert Guide: Windows Server 2008 Active Directory, Configuring (Pearson IT Certification, 2010)
pages 114-115
Conditional Forwarders
You can configure a DNS server as a conditional forwarder. This is a DNS server that handles name resolution
for specified domains only. In other words, the local DNS server will forward all the queries that it receives for
names ending with a specific domain name to the conditional forwarder. This is especially useful in situations
where users in your company need access to resources in another company with a separate AD DS
forest and DNS zones, such as a partner company. In such a case, specify a conditional forwarderthat
directs such queries to the DNS server in the partner company while other queries are forwarded to the
Internet. Doing so reduces the need for adding secondary zones for partner companies on your DNS servers.