Your company uses Windows Server 2008 R2 Hyper-V servers to provide a Microsoft Virtual Desktop Infrastructure （VDI） environment.  Maintenance tasks result in reduced capacity on several servers. You need to prevent servers from experiencing performance problems during maintenance.  What should you do？（）

• A、Set the user logon mode on every server to Enabled
• B、Create additional DNS A records for the servers， and use DNS round-robin
• C、In Remote Desktop Connection Broker， assign a lower weight to the servers that will undergo maintenance
• D、In Remote Desktop Connection Broker， assign a higher weight to the servers that will undergo maintenance