In the context of training methods, which of the following is a difference between on-the-job training and role-playing?

a.     On-the-job training requires organizations to hire skilled trainers, whereas role-playing does not involve trainers,

b.      On-the-job training is specifically used when the training objective is to develop analytical and personality skills, whereas role playing is usually used when the training objective is to impart knowledge to trainees.

c.       In on-the-job training, trainees learn by watching experienced employees perform their job and eventually by working alongside the experienced employees, whereas in role playing, trainees practice new behaviors by acting out what they would do in job-related situations

d.     d. In on-the-job training, top-level managers give informal advice and suggestions to trainees, whereas in role playing, mentors guide trainees through live tasks.