What is an important feature for power users running multi-tasking or multithreaded applications in
the HP Z420 Workstation?

A.
Support for 8 displays

B.
Intel®6 core and 8 core processors

C.
Dual CPU sockets

D.
32 GBmemory support

Explanation:
Reference:http://www.hp.com/unitedstates/campaigns/workstations/images/datasheet_z420.pdf(last page, see the text in fine-print,

bulleted point#1)