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 following message:
nfs mount: host1: : RPC: Program not registered
nfs mount: retrying: /usr/share/man

What can you do to solve this problem?

A.
ensure that nfsd is running on the local system

B.
ensure that mountd is running on the NFS server

C.
send a HUP signal to the rpcbind process the local system

D.
use rpcinfo -p to ensure that the mount command is registered with rpcbind