What should you configure?

Your network contains an Active Directory domain named contoso.com. The domain
contains a domain controller named DC1 that hosts the primary DNS zone for contoso.com.
All client computers are configured to use DC1 as the primary DNS server.
You need to configure DC1 to resolve any DNS requests that are not for the contoso.com
zone by querying the DNS server of your Internet Service Provider (ISP).
What should you configure?

A.
Naming Authority Pointer (NAPTR) DNS resource records (RR)

B.
Name server (NS) records

C.
Forwarders

D.
Conditional forwarders

Explanation:
On a network with several servers and/or client computers a server that is configured as a
forwarder will manage the Domain Name System (DNS) traffic between your network and
the Internet.