A user would like their shell prompt to reflect the current directory. Which of the following environment variables can be set to accomplish this？（）

单项选择题WhichofthefollowingcommandscanbeusedtogetthesystemreadytophysicallyinsertaPCIhotplugadaptor？（）

A.mkdev
B.cfmgr
C.drslot
D.lsslot

单项选择题WhichofthefollowingcommandscanbeusedtoidentifyallPCIhotplugslotsonaserverandtheircharacteristics？（）

A.lsattr -l pci
B.lscfg -Cc pci
C.lsconn -p pci -a
D.lsslot -c pci -a