Which of the following item colorizes the paper using a two-component laser printer？ （）

A.Check for the latest video drivers.
B.Install a known-good video adapter.
C.Attach the monitor to a known-good computer.
D.Replace the monitor.

A.Upgrade the motherboard BIOS.
B.Upgrade to Windows XP Professional.
C.Upgrade the CPU on the motherboard.
D.Return to Windows 2000 Professional.

A.USB security key
B.smart card reader
C.thumb print reader
D.encryption password