Which of the following is an example of functional conflict?

Which of the following is an example of functional conflict?
 A) Interpersonal conflict in the coding area that results in the individual causing the initial conflict quitting
  B) Conflict between the coding and billing departments that results in discovery of a problem that has caused the unbilled accounts report to be inaccurate
  C) Conflict between department representatives on a chargemaster team that causes a delay in updating the chargemaster
  D) Conflict between a patient and the release of information specialist about the need to charge for printed copies of health records