单项选择题

A.Run the calibration feature on the laser printer.B.Ru……

A laser printer is sent for repair and the work order indicates that there is an image printing problem. Which of the following should a technician do FIRST to confirm this problem？（）

A.Run the calibration feature on the laser printer.
B.Run a self-test image page from the printer.
C.Clean the corona wire and return printer.
D.Print a test page from a computer.

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