Which three actions should you perform?

Your network contains an Active Directory domain named contoso.com. All servers run
Windows Server 2012 R2. The domain contains two servers. The servers are configured as
shown in the following table.

All client computers run Windows 8 Enterprise.
You plan to deploy Network Access Protection (NAP) by using IPSec enforcement.
A Group Policy object (GPO) named GPO1 is configured to deploy a trusted server group to
all of the client computers.
You need to ensure that the client computers can discover HRA servers automatically.
Which three actions should you perform? (Each correct answer presents part of the solution.
Choose three.)

A.
On all of the client computers, configure the EnableDiscovery registry key.

B.
In a GPO, modify the Request Policy setting for the NAP Client Configuration.

C.
On Server2/ configure the EnableDiscovery registry key.

D.
On DC1, create a service location (SRV) record.

E.
On DC1, create an alias (CNAME) record.