Which steps are mandatory to enable Direct NFS?()<br /> 1. Mount all required file systems using the kernel NFS driver.<br /> 2. Create an oranfstab file containing the attributes for each NFS server to be accessed using Direct NFS.<br /> 3. Replace the ODM library libodm11.so_stub with libodm11.so.
A、2 and 3
B、1 and 3
C、1 and 2
D、1, 2 and 3