Your company has a single Active Directory directory service domain. All servers in your environment run Windows Server 2003. Client computers run Windows XP or Windows Vista. You plan to create a security update scan procedure for client computers. You need to choose a security tool that supports all the client computers.

Which tool should you choose?

A.
UrlScan Security Tool

B.
Enterprise Scan Tool (EST)

C.
Malicious Removal Tool (MRT)

D.
Microsoft Baseline Security Analyzer (MBSA)