You have a computer that runs Windows XP Professional Service Pack 2 (SP2). You need to configure the computer so that Windows updates are downloaded nightly. You must prevent the updates from being installed automatically. What should you do?（） 

• A、Modify Automatic Updates. 
• B、Install and configure Windows Defender. 
• C、Create a scheduled task that runs gpupdate.exe /sync.
• D、Create a scheduled task that runs winnt32. exe /duprepare.