Your network contains an Active Directory domain. The domain contains two domain controllers named DC1 and DC2. DC1 hosts a standard primary DNS zone for the domain. Dynamic updates are enabled on the zone. DC2 hosts a standard secondary DNS zone for the domain. You need to configure DNS to allow only secure dynamic updates. What should you do first()
A. On DC1 and DC2, configure a trust anchor.
B. On DC1 and DC2, configure a connection security rule.
C. On DC1, configure the zone transfer settings.
D. On DC1, configure the zone to be stored in Active Directory.