ou are the network administrator for your company. The network consists of a single Active Directory forest that contains one domain. The functional level of the forest is Windows 2000， and the functional level of the domain is Windows 2000 mixed. The domain contains four domain controllers named DC1， DC2， DC3， and DC4. There are two sites in the forest. DC1 and DC2 are in one site. DC3 and DC4 are in the other site. DC1 fails. You need to wait until the following week to restore DC1. While connected to DC3， you perform a bulk import of user accounts and receive an error message stating that a number of the user accounts could not be created. You need to ensure that the user accounts can be created. What should you do？（）

A. SeizethePDCemulatorroletoDC3.
B. SeizetherelativeID（RID）masterroletoDC3.
CreateareplicationobjecttoconnectDC3toDC2.
D. RaisethefunctionallevelofthedomainandthefunctionalleveloftheforesttoWindowsServer2003.