Your network contains an Active Directory forest named contoso.com.   You plan to add a new domain named nwtraders.com to the forest.  All DNS servers are domain controllers.   You need to ensure that the computers in nwtraders.com can update their Host （A） records on any of the  DNS servers in the forest.   What should you do（）

• A、Add the computer accounts of all the domain controllers to the DnsAdmins group.
• B、Add the computer accounts of all the domain controllers to the DnsUpdateProxy group.
• C、Create a standard primary zone on a domain controller in the forest root domain.
• D、Create an Active Directory-integrated zone on a domain controller in the forest root domain.