As an IT technician, you are responsible for maintaining your company's laser printers. Recently, you read that laser printers have a cleaning phase. Another IT technician explains that you do not need to clean a laser printer because of this phase. However, you do not agree. What actually occurs during this phase

When the drums revolution is completed, the toner still remaining on the photoreceptor drum is cleaned by a plastic blade that is made of soft electrically neutral material which then deposits waste toner into a toner reservoir in the printer. The drum is then charged to become uniformly negatively charge by a rolling charger to prepare the drum for the beam from the laser.

Explanation:

given the options, i would say your best bet is c. the modem supports up to 56 kbps, which is too low for video streaming. dial up modems use actual phone lines, which only can go up to 56 kbps as that's more than sufficient for traditional phone calls. this is also the reason why when a dial-up modem connects, you hear all those sounds. it's literally using the phone line to establish a connection.