You use Microsoft System Center Virtual Machine Manager （VMM） 2008 R2 to perform  physical-to-virtual （P2V） conversion s . Your companys network includes computers that each run one of the following operating systems ： Windows NT 4.0 Server with SP6a Windows 2000 Server with SP4 Windows Server 2003 with SP2 Windows Web Server 2008 R2 You need to choose the operating  systems that can be converted by using the online P2V method. Which two operating systems should you choose？（） 

• A、Windows NT 4.0 Server with SP6a
• B、Windows 2000 Server with SP4
• C、Windows Server 2003 with SP2
• D、Windows Web Server 2008 R2