A Laser Printer Is Producing Vertical Stripes About Half Way

Multiple Choice

A laser printer is producing vertical stripes about half way down each page at about a half inch wide and getting wider with each subsequent print. What is the most likely cause and solution?

A) The corona wire is faulty and needs to be replaced.
B) The toner cartridge is broken and needs to be replaced.
C) The printer drum is faulty and needs to be replaced.
D) The printer is running low on toner, which needs to be replaced.