单项选择题

Your computer runs Microsoft Windows XP Professional. The computer has the following hardware configuration:
 512 MB of RAM
 1-GHz processor
 60-GB hard disk
 15 GB of free space 
  64-MB video adapter. 
You perform a clean install of Microsoft Windows Vista. 
You need to ensure that Microsoft Windows Aero Experience is supported. 
What should you do?()

A.Upgrade the memory to 1 GB of RAM.
B.Upgrade the hard disk to 120 GB with 40 GB of free space.
C.Install a video adapter that has 128 MB of RAM, support for Microsoft DirectX 9, and Microsoft Pixel Shader 2.0.
D.Install a video adapter that has 128 MB of RAM, support for Microsoft Scalable Link Interface (SLI) and Microsoft Pixel Shader 2.0.

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