Human resources director: In the past, mentorship at my company was in

Human resources director:­ In the past, mentorship at my company was informal. But our new mentor program pairs an employee seeking mentorship with a manager or executive who has volunteered to mentor for a certain length of time. It has also been proposed that we use a personality test to better match employees with mentors, but I have decided against this, for in my judgement it would reduce participation in the program. 

Which of the following, if true, would provide the best justification for the human resources director's decision?

A - Employees at all levels are more likely to participate in mentoring programs if those programs are organized on a formal basis
B - Informal mentoring arrangements at the human resources director's company have helped many employees become more productive
C - A potential mentor is less likely to regard another employee as a competitor if that person has been randomly assigned to the mentor
D - Managers and executives are more likely to volunteer as mentors if they observe their peers doing so
E - Personality tests are required as part of the pre-employment screening process at the human resource director's company