Which /etc/exports entry shares /nfs_share with localhost using rw, sync, and no_root_squash?
/etc/exports
/nfs_share
localhost
rw
sync
no_root_squash
localhost:/nfs_share /mnt/nfs
/nfs_share localhost(rw,sync,no_root_squash)
/mnt/nfs localhost(rw,sync,no_root_squash)
/nfs_share (rw,sync,no_root_squash)