You need to assign a user named User1 permission to add and delete records from the contoso.com zone only

Your network contains an Active Directory domain named contoso.com. The domain contains a
server named Server1 that runs Windows Server 2012 R2 and has the DNS Server server role
installed.
Server1 has a zone named contoso.com. The zone is configured as shown in the exhibit. (Click the
Exhibit button.)

You need to assign a user named User1 permission to add and delete records from the contoso.com
zone only.
What should you do first?

A.
Enable the Advanced view from DNS Manager.

B.
Add User1 to the DnsUpdateProxy group.

C.
Run the New Delegation Wizard.

D.
Configure the zone to be Active Directory-integrated.