[单项选择]A System Administrator needs to determine if the system has the latest version of perfmgr and if the filesets copied to the /tmp directory are the latest. Which of the following command sequences would be required to accomplish this?() A. lslpp -l perfmgr.* ; cd /tmp ; installp -ld B. smitty list_software ; oslevel -g C. smitty list_software ; lslpp -f perfmgr* D. cd /usr/sys/install.images ; ls -la ; cd /tmp ; ls -la