You have an Exchange Server 2010 organization that consists of 50 Exchange Server 2010 servers. Your companys security policy states that approved Exchange and Windows Server patches and securityupdates must be applied to all Exchange servers within one week of being released. You need to recommend a patch management solution that meets the following requirements： .Allow administrators to manually approve patches and security updates .Allow only the installation of approved patches and security updates .Minimize the administrative effort to deploy patches .Minimize the deployment costs What should you include in the solution？（）

A. Microsoft Update
B. Microsoft System Center Configuration Manager
C. Windows Server Update Services
D. Windows Update