______ has the highest throughput.

A.
USB

B.
USB 2.0

C.
SCSI-1

D.
IEEE-1394

Explanation:
Not so easy to answer as new Firewire and SCSI standards are developed.
Max throughput:
Firewire: 400 Mbps (original specification) Firewire: IEEE 1894b: 800 Mbps USB 2.0: 480 Mbps
Ultra3 SCSI: 1280 Mbps