You need to configure a name resolution solution that will enable name resolution in the event of a WAN link failure

You work as a Network Administrator at AIOTestking.com. AIOTestking.com has a forest with a single an
Active Directory Domain Services (AD DS) domain named AIOTestking.com. All servers in the
AIOTestking.com domain have Microsoft Windows Server 2012 R2 installed.
AIOTestking.com works with a partner company named Redbridge Logistics. The Redbridge Logistics
network consists of a single Active Directory forest named RedbridgeLogistics.com. The forest
contains a single Active Directory Domain Services (AD DS) domain named
RedbridgeLogistics.com. All servers in the RedbridgeLogistics.com domain have Windows Server
2012 R2 installed.
A forest trust exists between the two forests. The two networks are connected by a WAN link.
A server named TESTKING-SR08 hosts an Active Directory-integrated zone for AIOTestking.com. A
server named REDBRIDGE-SR25 hosts an Active Directory-integrated zone for
RedbridgeLogistics.com
Users in the AIOTestking.com domain need to be able to resolve names of servers in the
RedbridgeLogistics.com domain.
You need to configure a name resolution solution that will enable name resolution in the event of a
WAN link failure.
What should you do?

A.
You should configure a forwarder on TESTKING-SR08.

B.
You should configure a forwarder on REDBRIDGE-SR25.

C.
You should configure a secondary zone on TESTKING-SR08.

D.
You should configure a stub zone on REDBRIDGE-SR25.

E.
You should configure a stub zone on TESTKING-SR08.

F.
You should configure a conditional forwarder on TESTKING-SR08.