You need to recommend changes to the DNS environment that support the implementation of the
sales.contoso.com domain. The solution must ensure that the users in all of the domains can resolve both
Internet names and the names of the servers in all of the internal domains.
What should you recommend?

A.
On the DNS servers in contoso.com, create a zone delegation in the contoso.com zone. On the DNS
servers in sales.contoso.com, add a forwarder to the contoso.com DNS servers.

B.
On the DNS servers in contoso.com, configure a reverse lookup zone. On the DNS servers in
sales.contoso.com, configure a conditional forwarder to contoso.com.

C.
On the DNS servers in contoso.com, configure a conditional forwarder to sales.contoso.com.
On the DNS servers in sales.contoso.com, configure a reverse zone.

D.
On the DNS servers in contoso.com, add a conditional forwarder to the sales.contoso.com zone. On the
DNS servers in sales.contoso.com, add a forwarder to the DNS servers of the company’s ISP.