You need to ensure that client computers can resolve IP addresses to host names

Your network contains multiple subnets.
On one of the subnets, you deploy a server named Server1 that runs Windows Server 2012 R2.
You install the DNS Server server role on Server1, and then you create a standard primary zone
named contoso.com.
You need to ensure that client computers can resolve IP addresses to host names.
What should you do first?

A.
Create a GlobalNames zone.

B.
Convert the contoso.com zone to an Active Directory-integrated zone.

C.
Configure dynamic updates for contoso.com.

D.
Create a reverse lookup zone.

Explanation:
Use a reverse lookup zone to be able to resolve IP addresses to host names.