You have a computer that has the following hardware configuration:

* 1.6-gigahertz (GHz) processor (64-bit).
* 8-GB RAM.
* 500-GB hard disk.
* Graphics card that has 128-MB RAM.

You need to select an edition of Window 7 to meet the following requirements:

* Support DirectAccess
* Support Windows XP Mode
* Use all of the installed memory
* Support joining an Active Directory domain

Which edition should you choose?

A.
Windows 7 Enterprise (64-bit)

B.
Windows 7 Enterprise (x86)

C.
Windows 7 Professional (64-bit)

D.
Windows 7 Ultimate (x86)