A system at 192.100.45.17 is able to print to the printer.  However, another system at 192.100.50.23 cannot print to the same printer.  All of the following should be performed EXCEPT:（）

• A、 Increase the size of /var. 
• B、 Check /etc/qconfig file. 
• C、 Check the default route. 
• D、 Check for name resolution.