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单项选择题A user states that the laser printer is leaving a black line on all pages being printed. Which of thefollowing is the MOST likely cause and solution for this issue?（）

A、Faulty driver; reinstall or update driver

B、Bad fuser; place service call to printer manufacturer.

C、Excess toner on drum; perform maintenance (e.g. clean drum surface).

D、Deteriorating rollers and worn brushes; replace rollers and brushes.

  • C

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