You need to ensure that the internal DNS infrastructure supports name resolution for DirectAccess

Your network contains an Active Directory domain. The domain contains a DNS server that runs
Windows Server 2008 R2. You plan to deploy DirectAccess on the network. You need to ensure that
the internal DNS infrastructure supports name resolution for DirectAccess. What should you do?

A.
Modify the Dynamic updates setting.

B.
Add a trust anchor.

C.
Modify the global query block list.

D.
Create a GlobalNames zone.