In Which of the Following Examples Would You Use Mentoring

In which of the following examples would you use mentoring to accomplish the training necessary?

A) Mary is a new employee who needs to learn how to operate all of the office equipment.
B) Joan's productivity has been decreasing since her work area was reorganized.
C) Eric recently finished his Bachelor's degree and is interested in a lead position.
D) Oliver has made several shipping errors in the past month which need to be addressed
E) Shane has expressed frustration and confusion about the new supply ordering process.