Your network consists of a single Active Directory domain. The functional level of the domain is Windows Server 2003. You extend the Active Directory Schema to support a custom user attribute. You need to assign the same value to the custom attribute for 1,500 users. You must achieve this goal by using the minimum amount of administrative effort. Which tool should you use? （）

• A、Adsiedit.msc
• B、Csvde.exe
• C、Dsmod.exe
• D、Ldifde.exe