Mike, a technician, is troubleshooting a printer issue. The print spooler for a local printer continues to fill up with new jobs and no jobs are being processed at the printer. Which of the following is MOST likely the cause?（）

• A、The network connection is unavailable.
• B、The printer is offline.
• C、The user does not have the proper security permissions.
• D、The print spooler is stopped.