You have a file that contains confidential customer data called customer489.dat. You need to make this file available to the sales group but protect the data from other users. You are not a member
of the sales group and you do not have root access.
-rw-r–r– 1 tbussart staff 465394 Apr 1 15:20 customer489.dat $ getent group sales
sales::1034:tom,dick,harry
Which command will configure the file for the described access?

A.
chgrp sales /export/home/tbussart/customer489.dat

B.
groupadd sales /export/home/tbussart/customer489.dat

C.
setfacl -m g:sales:rw-,m:rw- /export/home/tbussart/customer489.dat

D.
chmod +w /export/home/tbussart/customer489.dat