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 NFS.
• E、Oracle Disk Manager can manage NFS on its own, without using the operating system kernel NFS driver.