A system administrator has determined that a recently applied APAR needs to be removed. Which of the following installp options will remove the APAR？（）

AsystemadministratorhasbeenaskedtoinstallanAPARbutwants...

单项选择题A system administrator has been asked to install an APAR but wants to be able to easily remove it. Which install option should be used？（）

SeveralpeopleinanInformationTechnology（IT）departmentare...

单项选择题Several people in an Information Technology （IT） department are asking for fileset updates that the system administrator received earlier that day on CD-ROM. The system administrator created an install directory on their machine and made it available to everyone. Which of the following commands will allow the system administrator to copy the images from the CD-ROM to the install directory？（）

Asystemadministratorhasjustinstalledanewmaintenanceleve...

单项选择题A system administrator has just installed a new maintenance level， but "oslevel -r" does not show the correct maintenance level. What command can be used to determine which filesets are downlevel？（）