The utility that checks the file system structure is：（）

A.the BIOS settings are incorrect.
B.there is no floppy disk in the drive.
C.the computer was unable to make temporary space for the boot process.
D.the computer was unable to find the information needed to start the boot process.

A.EVDO PCMCIA modem card
B.floppy disk drive add-in card
C.802.11g PCMCIA card
D.56K v.34 PCMCIA modem card

A.voice navigation
B.stylus
C.scroll wheel
D.keyboard