Which of the following is true about on-the-job training (OJT)?a. It is less disruptive to the work flow than other types of employee training methods. b. It is flexible and relevant to what employees do.c. It is more expensive than classroom training. d. It is typically outsourced to external firms.

"On-the-job training" is an example of a training where individuals get their hands-on experience at a workplace. One advantage of this is it's flexibility because the trainee can learn not only his desired skill for his future job but also other skills that he may be able to use in the future. These skills are deemed relevant for the employees of the company. So, this makes letter b correct.

Letter a is incorrect because on-the job training can often cause distraction when it comes to the regular work flow. One example of this is the "job rotation." So, this is said to affect the productivity as well as the production process.

Letter c is incorrect because on-the-job training is cost-effective and less expensive than classroom training.

Letter d is incorrect because it is "off-the-job training" that is typically outsourced to external firms. This means that the training is not given at the actual real work location.

So, this explains the answer.