Which two statements about Oracle Direct Network File System (NFS) are true?（）

A. It bypasses the OS file system cache.
B. A separate NFS interface is required for use across Linux, UNIX, and Windows platforms.
C. It uses the operating system kernel NFS layer for user tasks and network communication modules.
D. File systems need not be mounted by the kernel NFS system when being served through Direct NF
E. Oracle Disk Manager can manage NFS on its own, without using the operating system kernel NFS driver.