Your computer runs Microsoft Windows XP Professional. The computer also runs 20 third-party applications. You plan to upgrade your computer to Microsoft Windows Vista.  The functionality of the existing 20 applications must be maintained even after you upgrade your computer.  You need to ascertain whether the hardware and software on the Windows XP Professional computer will support the upgrade.  What should you do？（）

• A、Run the mbsacli.exe command.
• B、Run the winnt32.exe /checkupgradeonly command.
• C、Run the Microsoft Windows Vista Upgrade Advisor application.
• D、Compare the Microsoft Windows XP Professional system hardware against the Microsoft Windows Vista Hardware Compatibility List （HCL）.