单选题Which of the following will cause a ghost image on a printout?（）AProblem with the developing drumBProblem with the formatter boardCWorn pickup rollersDScanner unit is defective
单选题
Which of the following will cause a ghost image on a printout?（）
A
Problem with the developing drum
B
Problem with the formatter board
C
Worn pickup rollers
D
Scanner unit is defective
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