Your network contains a domain controllerthat is configured as a DNS server.
The server hostsan Active Directory-integrated zone for the domain.
You need to reduce how long it takes until stale records are deleted from the zone.
What should you do?

A.
From the configuration directory partition of theforest, modify the tombstone lifetime.

B.
From the configuration directory partition of theforest, modify the garbage collection interval.

C.
From the aging properties of the zone, modify theno-refresh interval and the refresh interval.

D.
From the start of authority (SOA) record of the zone, modify the refresh interval and the expire interval.

Explanation:

http://technet.microsoft.com/en-us/library/cc816625%28v=ws.10%29.aspx
Set Aging and Scavenging Properties for a Zone
The DNS Server service supports aging and scavenging features. These features are provided as a
mechanism for performing cleanup and removal of stale resource records, which can accumulate in zone data
over time.
You can use this procedure to set the aging and scavenging properties for a specific zone using eitherthe DNS
Manager snap-in or the dnscmd command-line tool.
To set aging and scavenging properties for a zone using the Windows interface
1. Open DNS Manager. To open DNS Manager, click Start, point to Administrative Tools, and then click
DNS.
2. In the console tree, right-click the applicable zone, and then click Properties.
3. On the General tab, click Aging.
4. Select the Scavenge stale resource records check box.
5. Modify other aging and scavenging properties as needed.
To set aging and scavenging properties for a zone using a command line
1. Open a command prompt. To open an elevated Command Prompt window, click Start, point to All
Programs, click Accessories, right-click Command Prompt, and then click Run as administrator.
2. At the command prompt, type the following command, and then press ENTER:
dnscmd <ServerName> /Config <ZoneName> {/Aging <Value>|/RefreshInterval <Value>|/
NoRefreshInterval <Value>}