What Is Most Likely to Be a Reason That Headquarters

What is most likely to be a reason that headquarters personnel tend to ignore the advice of local nationals?

A) Foreign nationals are not keen on keeping up with current best practices.
B) Foreign nationals lack the understanding of how home-office politics work.
C) Foreign nationals have a good grasp of the local culture and prevalent practices.
D) Foreign nationals cannot build close contact with subordinates and customers.
E) Foreign nationals have superior technical expertise, but are not good at relationship management.