Why might your customer wish to add a USB 3.0 expansion card to an HP Z420, Z620 or Z820
workstation even though these workstations already have USB 3.0 ports?

A.
Because the workstations are capable of connecting to USB 3.0 devices but they only support
USB 2.0 communication

B.
Because the workstations support only specific protocols, and the expansion card is required
for additional protocols

C.
Because the workstations create a bottleneck when multiple USB 3.0 devices are running

D.
Because USB 3.0 is supported only with Windows 8; workstations with Windows 7 require the
expansion card