Your network consists of a single Active Directory domain that has three Active Directory sites. Each site contains two Active Directory domain controllers. All domain controllers run Windows Server 2003 Service Pack 2 (SP2). All domain controllers have Windows Support Tools installed. You need to verify the replication status of Active Directory. Which tool should you use?（）
- AActive Directory Sites and Services
- BNltest.exe
- CNetwork Monitor
- DReplmon.exe