Which of the following components is MOST likely to require lubrication?

Which of the following would be a good example of an open ended question used to gain insight about a failed device?

After toner is transferred to the paper, the next step is:

A customer has replaced a printer with a different model. The new printer now only prints random characters and symbols. Which of the following is the problem?

A customer reports that they are unable to print to their device. The technician discovers that no one in the office can print to the device but it is ready and can be pinged. Which of the following should the technician check FIRST?