Vestibule Training Is Best Defined As

Vestibule training is best defined as:

A) the on-the-job training method in which specific roles are assigned to the participants.
B) the on-the-job training program aimed at strengthening a particular skill of the participant.
C) the training that takes place on equipment set up in a special area away from the job site.
D) the training that involves delivering training programs via computer-based training aids.