Which tool should you use before you start the DFS Repl…

Your company deploys a new Active Directory forest named contoso.com. The first domain controller in theforest runs Windows Server 2012 R2. The forest contains a domain controller named DC10.
On DC10, the disk that contains the SYSVOL folder fails.
You replace the failed disk. You stop the Distributed File System (DFS) Replication service. You restore the
SYSVOL folder.
You need to perform a non-authoritative synchronization of SYSVOL on DC10.
Which tool should you use before you start the DFS Replication service on DC10?

A.
Active Directory Sites and Services

B.
Ultrasound

C.
Adsiedit.msc

D.
Frsutil

Explanation:
How to perform a non-authoritative synchronization of DFSR-replicated SYSVOL (like “D2” for FRS)
1. In theADSIEDIT.MSCtool modify the following distinguished name (DN) value and attribute on each of the
domain controllers that you want to make non-authoritative:CN=SYSVOL Subscription,CN=Domain System
Volume,CN=DFSR-LocalSettings,CN=<the server name>,OU=Domain Controllers,DC=<domain>msDFSREnabled=FALSE
2. Force Active Directory replication throughout the domain.
Etc