You are a network administrator for A Windows Server 2003 computer named Testking1 functions as a print server on the network. Testking1 contains a single printer named SalesPrinter12. Several users submit large print jobs to SalesPrinter12. A user reports that the print jobs fails to complete. You examine the print queue on SalesPrinter12, and you discover that one of the print jobs is showing an error. You attempt to delete the job, but you are unsuccessful. You need to ensure that print jobs submitted to SalesPrinter12 complete successfully. What should you do?（）

• A、Configure SalesPrinter12 to use a TCP/IP port.
• B、Increase the priority of SalesPrinter12.
• C、Delete all files from the C:/Windows/System32/Spool folder.
• D、Restart the spooler service on Testking1.