A system administrator can create logical volumes and then add file systems to them， or create the file system directly. What is an advantage of the two-step approach instead of the one-step approach？（）

A.The number of bytes per inode can be specified.
B.Placement of the filesystem on the disk can be specified.
C.The jfslog can be specified on creation of the filesystem.
D.Either a JFS or JFS2 filesystem can be created on the logical volume.