Why Has Customer Service Traditionally Been Kept Separate from the Public

Why has customer service traditionally been kept separate from the public relations department at most companies?

A) Customer service is a complex specialty of its own.
B) Public relations professionals are better trained in media relations.
C) The two disciplines are too different to work together.
D) It generates too many internal turf battles.
E) It does not make sense; the two functions should be combined.