Which HP system can be upgraded to a full HP CloudSystem?

A.
HP CloudSystem VS1

B.
HP DL980

C.
HP VirtualSystem MC1

D.
HP VirtualSystem VS2

Explanation:
Reference:http://h17007.www1.hp.com/us/en/whatsnew/june/060611-6.aspx#/2(last bulleted point
on the page)