Your network contains an Active Directory domain named contoso.com.
You have a DHCP server named Server1 that runs Windows Server 2008.
You install Windows Server 2012 R2 on a server named Server2.You install the DHCP Server server role on Server2.
You need to migrate the DHCP services from Server1 to Server2. The solution must meet the following requirements:
Ensure that existing leases are migrated.
Prevent lease conflicts.
Which three actions should you perform? (Each correct answer presents part of the solution. Choose three.)

A.
On Server1, run the Export-DhcpServercmdlet.

B.
On Server1, run the Stop-Service cmdlet.

C.
On Server2, run the Receive-SmigServerDatacmdlet.

D.
On Server2, run the Stop-Service cmdlet.

E.
On Server2, run the Import-DhcpServercmdlet.

F.
On Server1, run the Send-SmigServerDatacmdlet.