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.