You are working on a system connected to the network. You attempt to NFS mount a directory. # mount host1:/usr/share/man /usr/share/man Your system displays the message: nfs mount: host1: : RPC:: Program not registered
nfs mount: retrying: /usr/share/man What is a possible cause of this problem?

A.
The nfsd process is not registered with the rpcbind process.

B.
The mountd process is not registered with the rpcbind process.

C.
The mount command is not registered with the rpcbind process.

D.
The rpcbind process cannot access the /usr/share/man directory.