Your company has client computers that run Windows Vista and client computers that run Windows 7. The client computers connect directly to the Microsoft Update Web site once per week and automatically install all available security updates. Microsoft releases a security update for Windows 7. You have the following requirements： Create a report of all Windows 7 computers that are currently connected to the network and that do not have the security update installed. Use the least amount of administrative effort. You need to manage the software update process to meet the requirements. What should you do？（）

A. Deploy Microsoft Windows Server Update Services （WSUS）. Approve the security update for installation，and forcea detection cycle on the client computers.
B. Deploy Microsoft Windows Server Update Services （WSUS）. Approve the security update for detection， and force adetection cycle on the client computers.
C. Use the Microsoft Baseline Security Analyzer （MBSA） to scan the client computers.Configure MBSA to use the Microsoft Update site catalog.
D. Use the Microsoft Baseline Configuration Analyzer （MBCA） to scan the client computers.