At Corpceton, a plastic products manufacturing company, all newly hired machine operators are assigned to senior machine operators who train the former for a few weeks. The newly hired machine operators assist the senior machine operators in their work. After the new operators complete three months of probation in the company, each of them is given their own machine to operate. In the context of training methods, this scenario best illustrates _____. Group of answer choices refresher training diversity training vestibule training sensitivity training on-the-job training