Which phrase correctly positions HP Z420 workstations in the HP portfolio?

A.
The most efficient HP workstation to date with maximum expandability

B.
The industry’s first all-in-one workstation

C.
Entry-level HP workstation to upgrade from an HP Elite business desktop

D.
Value-priced single socket workstation that delivers power and performance

Explanation:
http://www8.hp.com/us/en/campaigns/workstations/z620.html