为了用软盘启动系统在DOS下进行系统维护，应在“CMOSSETUP”中将”BootSequence”项设为（）。

A、C，A，，CDROM
B、CDROM，C，A
C、COnly
D、A，C

A.ADVANCED CMOS SETUP
B.STANDARD CMOS SETUP
C.BIOSFEATURES SETUP
D.SUPERVISOR PASSWORD

A.SPK out
B.Line In
C.Line Out
D.MIC In