Your network contains an Active Directory domain named contoso.com.
The contoso.com DNS zone is stored in Active Directory. All domain controllers run
Windows Server 2008 R2.
You need to identify if all of the DNS records used for Active Directory replication are
correctly registered.
What should you do?

A.
From the command prompt, use netsh.exe.

B.
From the command prompt, use dnslint.exe.

C.
From the Active Directory Module for Windows PowerShell, run the Get-ADRootDSE
cmdlet.

D.
From the Active Directory Module for Windows PowerShell, run the GetADDomainController cmdlet.

Explanation:
http://technet.microsoft.com/en-us/library/dd197560.aspx
Dnslint.exe
DNSLint is a Microsoft Windows tool that can be used to help diagnose common DNS name
resolution issues.
It can be targeted to look for specific DNS record sets and ensure that they are consistent
across multiple DNS servers. It can also be used to verify that DNS records used specifically
for Active Directory replication are correct.