Which of the following organizations would be well$-$suited and likely to benefit from the implementation of $$cross$-$training$$ of teams?

a$.$ an auto parts manufacturing company that has an assembly line where employees are likely to get bored

b$.$ a robotics company that needs each employee to have specific and high level skills and training

c$.$ a photocopy shop where there are various tasks to be performed all with one machine

d$.$ a document delivery company that has drivers and pilots who operate various trucks and aircraft