The Variability of Quality and Content of OJT Between Businesses

The variability of quality and content of OJT between businesses:

A) is beneficial because of the increased diversity of abilities.
B) makes it difficult for managers to judge the skill level of workers from other firms.
C) makes OJT undesirable for small businesses that lack large HR departments.
D) makes OJT the best choice for most organizations because of the lack of distractions.