What claim can you make about the HP Z1 that will differentiate it from the competition?

A.
first all-in-one workstation

B.
first all-in-one workstation with 27 inch display

C.
only workstation offering 1333 MHZ DDR3 memory

D.
only workstation available with Microsoft Windows 7

Explanation:
Reference:http://www.hp.com/united-states/campaigns/workstations/z1_features.html(see the first
paragraph on the page in slideshow. Introducing power without the tower)