While installing an application， the administrator is instructed to perform two final tasks prior to starting the application：   1.Set the ownership of a file named ’control_file’ to be owned by the user ’database’ and the group ’appsrvr’.   2.Change the permissions of ’control_file’ to 0766.   After these two tasks have been completed， what will the file permissions look like when ’ls -l control_file’ is executed？（）

A、-rwxrw-rw- 1 database appsrvr 4913 Mar 17 08：24 control_file

B、-rw-r--r-- 1 appsrvr database 4913 Mar 17 08：24 control_file

C、-rw-r--r-- 1 database appsrvr 4913 Mar 17 08：24 control_file

D、-rwxrw-rw- 1 appsrvr database 4913 Mar 17 08：24 control_file