单项选择题
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.
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