You wish to revoke write access for all groups and named users on a file. Which command will make
the correct ACL changes?

A.
setfacl x group:*:rx,user:*:rx afile

B.
setfacl x mask::rx afile

C.
setfacl m mask::rx afile

D.
setfacl m group:*:rx,user:*:rx afile