Which two actions should you perform?

Note: This question is part of a series of questions that use the same scenario. For your convenience, the
scenario is repeated in each question. Each question presents a different goal and answer choices, but the text
of the scenario is exactly the same in each question in this series.
Your network contains an Active Directory domain named contoso.com. The functional level of the domain is
Windows Server 2012.
The network uses an address space of 192.168.0.0/16 and contains multiple subnets.The network is not connected to the Internet.
The domain contains three servers configured as shown in the following table.

Client computers obtain TCP/IP settings from Server3.
You add a second network adapter to Server2. You connect the new network adapter to the Internet. You install
the Routing role service on Server2.
Server1 has four DNS zones configured as shown in the following table.

You need to ensure that when a computer is removed from the network, the associated records are deleted
automatically after 15 days.
Which two actions should you perform? Each correct answer presents part of the solution.

A.
Create a scheduled task that runs the Remove-Computer cmdlet.

B.
Modify the Zone Aging/Scavenging Properties of the zone.

C.
Modify the Time to live (TTL) value of the start of authority (SOA) record.

D.
Set the Scavenging period of Server1.

E.
Modify the Expires after value of the start of authority (SOA) record.

Explanation:
https://technet.microsoft.com/en-us/library/cc771362(v=ws.10).aspx