You have a computer that runs Windows 7 Home Premium. You need to upgrade the computer to Windows7 Ultimate. You must achieve this goal in the minimum amount of time.  What should you do?（）

• A、Perform a Windows Anytime Upgrade.
• B、Download and run the Windows 7 Upgrade Advisor.
• C、Insert the Windows 7 installation media. From the Install Windows dialog box， select the Upgrade option.
• D、Start the computer from the Windows 7 installation media. From the Install Windows dialog box， selectthe Upgrade option.