ThesystemadministratorhasdeterminedthatanewJFSlogneedstobecreatedonadifferentdisk,inordertodecreaseanI／Obottleneck.Whichofthefollowingstepsarethemostcorrect?()

A.mklv-tjfslog-yLVnameVGname1PVnamelogform/dev/LVname chfs-alog=/dev/LVname/filesystemnamem ountandunmountfilesystem

B.mklv-tjfslog-yLVnameVGnamePVnameunmountfilesystemvi/etc/filesystems，changeentryforlvtopointfilesystemtonewJFSlogmountfilesystem

C.mklvcopy-ajfslog-yLVnameVGname1PVname chfs-alog=/dev/LVname/filesystemname unmountandmountfilesystem

D.mklvcopy-tjfslog-yLVnameVGname1PVname logform/dev/LVname vi/etc/filesystems，changeentryforlvtopointfilesystemtonewJFSlog unmountandmountfilesystem